CN211013454U

CN211013454U - Lens refractive index detection device

Info

Publication number: CN211013454U
Application number: CN201921496970.XU
Authority: CN
Inventors: 刘义兵; 孙昭; 刘力威
Original assignee: Ningbo Flo Optical Co ltd
Current assignee: Ningbo Flo Optical Co ltd
Priority date: 2019-09-10
Filing date: 2019-09-10
Publication date: 2020-07-14
Anticipated expiration: 2029-09-10

Abstract

A device for detecting the refractive index of a lens is characterized in that: including light source module, the central physical thickness detection module of lens and the central optical thickness detection module of lens, light source module is including first light source subassembly, the first subassembly of focusing that is used for exporting collimated light beam, the central physical thickness detection module of lens includes first image component and second image component, the central optical thickness detection module of lens includes first photoelectric detection subassembly, second photoelectric detection subassembly, beam split subassembly, the first speculum of partial reflection, mobilizable second mirror. The lens refractive index detection device is simple to operate, can perform online rapid nondestructive detection, and is also suitable for non-regular surface lenses such as aspheric lenses and cylindrical lenses and finished lenses.

Description

Lens refractive index detection device

Technical Field

The utility model relates to an optical lens parameter detection technical field, concretely relates to lens refracting index detection device.

Background

The refractive index parameter is an important parameter index of the optical lens, and in order to ensure good imaging quality of an optical system, the refractive index of an optical material needs to be accurately measured. At present, the refractive index of an optical glass material is measured with high precision by a minimum deviation angle method, but the minimum deviation angle method is used for detection on the premise that optical glass to be measured needs to be made into a prism for light refraction, and meanwhile, the related angle of the prism needs to be accurately detected. Therefore, the minimum deviation angle method for detecting the refractive index of the optical glass material is a direct detection method, and has the following technical problems: 1. the need to destroy the optical elements, which is not necessarily suitable for inspection of the finished lens; 2. the prism is difficult to manufacture, the period is long, and corresponding prisms are required to be manufactured respectively aiming at optical glass of different batches and different materials, so that the detection efficiency is low; 3. the test uses a prism, so the method is not suitable for detecting the lens with irregular surface such as an aspheric lens, a cylindrical lens and the like. The minimum deviation angle method is relatively suitable for glass manufacturers to detect raw material glass of the same batch, but is not suitable for on-line high-precision detection of finished lenses, for example, refractive index detection of spectacle lenses needs to be realized without knowing the material of an optical element and without damaging the optical element, so as to determine the material property of the spectacle lenses.

At present, the refractive index detection methods for finished lenses mainly comprise 2 methods: one method is to perform reverse calculation according to a focal power formula, namely, a mechanical precision measurement method is used for measuring the front and back surface curvatures, the center thickness and the focal power of the lens, and the wavelength refractive index is calculated according to the focal power formula; another method is to change the "environment" refractive index, i.e. by changing the refractive index of the medium in contact with the front and back surfaces of the lens, such as placing the lens in a solution with a known refractive index, or attaching flexible media with a known refractive index to the front and back surfaces of the lens, the refractive powers of the lens in the air and in the solution are respectively detected, and the refractive index of the lens can be calculated according to the change of the refractive index and the refractive index of the solution.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the first technical problem who solves is: the lens refractive index detection device is simple to operate, can perform online rapid nondestructive detection, and is also suitable for non-regular surface lenses such as aspheric lenses, cylindrical lenses and the like and finished lenses.

The utility model discloses technical solution to first technical problem is: a device for detecting the refractive index of a lens is characterized in that: the device comprises a light source module, a lens center physical thickness detection module and a lens center optical thickness detection module, wherein the light source module comprises a first light source component and a first focusing component which are used for outputting collimated light beams, the lens center physical thickness detection module comprises a first imaging component and a second imaging component, the lens center optical thickness detection module comprises a first photoelectric detection component, a second photoelectric detection component, a light splitting component, a partially-reflected first reflecting mirror and a movable second reflecting mirror, the second photoelectric detection component, the first reflecting mirror, the light splitting component, the first focusing component and the first light source component are sequentially arranged from front to back along a first optical axis direction, the movable second reflecting mirror is arranged on one side of the light splitting component, the first photoelectric detection component is arranged on the other side of the light splitting component, and the focal plane of the first focusing component is positioned between the light splitting component and the first reflecting mirror and is used for placing a measured lens, the first imaging component and the second imaging component are respectively arranged above and below the measured lens, collimated light beams transmitted by the first light source component along the first optical axis direction are focused at the measured lens through the first focusing component, scattering light spots are generated on the upper surface and the lower surface of the measured lens and detected by the first imaging component and the second imaging component, light beams focused by the first light source component are transmitted to the second photoelectric detection component through the first reflector part, light beams transmitted by the first light source component along the first optical axis direction are divided into two beams through the light splitting component, one beam is projected onto the second reflector and reflected by the second reflector to return to the original path, the other beam is projected onto the first reflector and reflected by the first reflector to return to the original path, and the other beam is reflected into the first photoelectric detection component through the light splitting component, the two returned beams enter the first photoelectric detection assembly for detecting the interference phenomenon.

The working principle of the technical scheme is as follows:

before the measured lens is placed, a first light source assembly is opened, collimated light beams emitted by the first light source assembly are focused by a first focusing assembly, partially transmitted out by a first reflector and projected into a second photoelectric detection assembly, and the center position of light spots of the projected light beams is monitored by the second photoelectric detection assembly and is used as a reference position for subsequent position adjustment of the measured lens; placing the measured lens, monitoring the actual light spot center position of the projected light beam by the second photoelectric detection component, comparing the actual light spot center position with the previously obtained reference position, guiding a user to adjust the position of the measured lens according to the deviation of the actual light spot center position and the reference position, and when the actual light spot center position is superposed with the reference position, superposing the measured lens center with the light path center, namely completing the position adjustment of the measured lens; meanwhile, collimated light beams emitted by the first light source component are focused at the measured lens through the first focusing component, light scattering is generated on the upper surface and the lower surface of the measured lens, the scattered light on the upper surface and the scattered light on the lower surface of the measured lens are imaged by the first imaging component and the second imaging component respectively, the measurement of the space heights of scattering light spots on the upper surface and the lower surface of the measured lens is realized, and the space height difference of the scattering light spots on the upper surface and the lower surface of the measured lens is the lens center physical thickness D0; in addition, the light beam that first light source subassembly sent still divides into two bundles through the beam split subassembly, one is thrown on the second mirror and is reflected by the second mirror and the return of original way, another bundle is thrown on the first mirror and is reflected by first speculum and the return of original way, two bundles of light beams that return all enter into first photoelectric detection subassembly through the beam split subassembly, move the second mirror to suitable position, the light beam that first light source subassembly sent is to the optical distance of second speculum and the optical distance to first speculum is equal completely, the light beam that the second mirror reflected back and the light beam that first speculum reflected back will take place the interference phenomenon in first photoelectric detection subassembly, before putting into the measured lens, record first light source subassembly is sent, the record is firstThe position d1 of the second reflector when the interference phenomenon occurs in the photoelectric detection component, after the measured lens is placed, the position of the second reflector is readjusted, and the difference between the position d2, the position d2 and the position d1 of the second reflector when the interference phenomenon occurs again in the first photoelectric detection component is related to the central optical thickness of the lens; then, the refractive index of the measured lens is calculated according to the lens center physical thickness D0 and the lens center optical thickness related parameters D1 and D2, and the calculation formula is as follows:

the beneficial effects of the above technical scheme are as follows:

the utility model discloses lens refracting index detection device is through detecting the space altitude difference and the interference phenomenon of the scattering facula that focus light beam produced on the measured lens upper and lower surface and obtaining the relevant parameter of calculation refracting index, need not to make the prism, also need not to detect the relevant angle of prism, and it is more convenient to operate, and shortened the detection cycle, can realize online quick detection; the optical element to be detected can not be damaged without manufacturing a prism, so that the method is also very suitable for detecting the finished lens; and the detection of the spatial height difference and the interference phenomenon of the scattering light spots is also suitable for non-regular surface lenses such as aspheric lenses and cylindrical lenses.

The utility model discloses the second technical problem that solve is: the device for detecting the refractive index of the lens is simple to operate, can perform online rapid nondestructive detection, is also suitable for non-regular surface lenses such as aspheric lenses, cylindrical lenses and the like and finished lenses, and has a power detection function.

The utility model discloses a first technical solution to second technical problem is: a device for detecting the refractive index of a lens is characterized in that: the detection device comprises a light source module, a lens center physical thickness detection module and a lens center optical thickness detection module, wherein the light source module comprises a first light source component for outputting a collimated light beam and a removable first focusing component, the lens center physical thickness detection module comprises a first imaging component and a second imaging component, the lens center optical thickness detection module comprises a first photoelectric detection component, a second photoelectric detection component, a light splitting component, a Hartmann plate and a movable second reflecting mirror, the second photoelectric detection component, the Hartmann plate, the light splitting component, the removable first focusing component and the first light source component are sequentially arranged from front to back along a first optical axis direction, a reflecting film is coated on the upper surface of the Hartmann plate and used for partially reflecting the light beam of the first light source component, and an array type light transmission hole is formed in the lower surface of the Hartmann plate and used for projecting a light spot array to the second photoelectric detection component, the movable second reflector is arranged on one side of the light splitting component, the first photoelectric detection component is arranged on the other side of the light splitting component, the focal plane of the first focusing component is positioned between the light splitting component and the Hartmann plate and used for placing a measured lens, the first imaging component and the second imaging component are respectively arranged above and below the measured lens, when the first focusing component is removed, the collimated light beam transmitted by the first light source component along the first optical axis direction is transmitted through the light splitting component and then is projected onto the measured lens and the Hartmann plate and enters the second photoelectric detection component, the second photoelectric detection component detects the light spot array projected by the Hartmann plate, after the first focusing component is inserted, the collimated light beam transmitted by the first light source component along the first optical axis direction is transmitted through the light splitting component and is focused at the measured lens by the first focusing component, and meanwhile, the collimated light beam transmitted by the first light source component along the first optical axis direction is focused on the measured lens, The lower surface generates scattering light spots and is detected by the first imaging component and the second imaging component, in addition, light beams transmitted by the first light source component along the direction of the first optical axis are further divided into two beams by the light splitting component, one beam is projected onto the second reflector and reflected by the second reflector to return along the original path, the other beam is further transmitted into the first photoelectric detection component by the light splitting component, the other beam is projected onto the Hartmann plate and reflected by the upper surface of the Hartmann plate to return along the original path, the other beam is also reflected into the first photoelectric detection component by the light splitting component, and the two returned light beams enter the first photoelectric detection component to be used for detecting the interference phenomenon.

The working principle of the technical scheme is as follows:

before the measured lens and the first focusing assembly move in, a first light source assembly is opened, collimated light beams transmitted by the first light source assembly along the direction of a first optical axis sequentially penetrate through the light splitting assembly and the Hartmann plate and then enter a second photoelectric detection assembly, the second photoelectric detection assembly detects a light spot array projected by the Hartmann plate, and the position of the light spot array is used as a reference position for subsequent position adjustment and focal power calculation of the measured lens; then the light beam transmitted by the first light source component along the direction of the first optical axis is divided into two beams by the light splitting component after passing through the first focusing component, one beam is projected onto the second reflector and reflected by the second reflector to return to the original path, the other beam is projected onto the Hartmann plate and reflected by the upper surface of the Hartmann plate to return to the original path, the two returned beams enter the first photoelectric detection component through the light splitting component to be used for detecting the interference phenomenon, and the position d1 of the second reflector when the interference phenomenon occurs is recorded; removing the first focusing component, moving the first focusing component into the measured lens, monitoring the projected actual light spot array by the second photoelectric detection component, calculating the center position of the lens at the moment according to the deviation of the position of the actual light spot array and the reference position obtained in the step (1), and guiding a user to adjust the position of the measured lens to enable the center of the measured lens to coincide with the center of the light path, so that the position adjustment of the measured lens is completed; meanwhile, the focal power of the measured lens can be calculated according to the deviation between the position of the actual light spot array and the reference position obtained in the step (1); then moving into the first focusing assembly, readjusting the position of the second reflector, recording the position D2 of the second reflector when the interference phenomenon occurs again in the first photoelectric detection assembly, wherein the difference value between D2 and D1 is related to the central optical thickness of the lens, meanwhile, the collimated light beam transmitted by the first light source assembly along the direction of the first optical axis also transmits through the light splitting assembly and is focused at the measured lens by the first focusing assembly, light scattering is generated on the upper surface and the lower surface of the measured lens, the first imaging assembly and the second imaging assembly respectively image scattered light on the upper surface and the lower surface of the measured lens, the space height measurement of scattering light spots on the upper surface and the lower surface of the measured lens is realized, and the space height difference of the scattering light spots on the upper surface and the lower surface of the measured lens is the central physical thickness D0 of the; then, the refractive index of the measured lens is calculated according to the lens center physical thickness D0 and the lens center optical thickness related parameters D1 and D2, and the calculation formula is as follows: n is 1+ (D2-D1)/D0.

The utility model discloses a second technical solution to second technical problem is: a device for detecting the refractive index of a lens is characterized in that: the lens central physical thickness detection module comprises a first imaging component and a second imaging component, the lens central optical thickness detection module comprises a first photoelectric detection component, a second photoelectric detection component, a light splitting component, a Hartmann plate and a movable second mirror, the second photoelectric detection component, the Hartmann plate, the light splitting component, the first light combining component and the second light source component are sequentially arranged from front to back along a first optical axis direction, the first light source component is arranged on one side of the first light combining component, and the first focusing component is arranged between the first light source component and the first light combining component, the upper surface of the Hartmann plate is coated with a reflecting film for partially reflecting light beams of a first light source component, the lower surface of the Hartmann plate is provided with an array type light-transmitting hole for projecting a light spot array to a second photoelectric detection component, the movable second reflecting mirror is arranged at one side of the light splitting component, the first photoelectric detection component is arranged at the other side of the light splitting component, the focal plane of the first focusing component is positioned between the light splitting component and the Hartmann plate and used for placing a measured lens, the first imaging component and the second imaging component are respectively arranged above and below the measured lens, the light beams output by the first light source component are transmitted along the direction of a first optical axis after being reflected by the first light combining component and are focused at the measured lens by the first focusing component, and meanwhile, scattering light spots are generated on the upper surface and the lower surface of the measured lens and are detected by the first imaging component and the second imaging component, meanwhile, a light beam transmitted by the first light source component along the direction of the first optical axis is divided into two beams by the light splitting component, one beam is projected onto the second reflector and reflected by the second reflector to return to the original path, the other beam is projected onto the Hartmann plate and reflected by the upper surface of the Hartmann plate to return to the original path, and is also reflected into the first photoelectric detection component by the light splitting component, the two returned light beams enter the first photoelectric detection component to be used for detecting the interference phenomenon, the collimated light beam transmitted by the second light source component along the direction of the first optical axis is transmitted into the second photoelectric detection component after being transmitted through the first light combining component, the light splitting component, the measured lens and the Hartmann plate, and the light spot array projected by the Hartmann plate is detected by the second photoelectric detection component.

The working principle of the technical scheme is as follows:

before the measured lens moves in, closing the first light source component, opening the second light source component, enabling collimated light beams transmitted by the second light source component along the direction of the first optical axis to pass through the first light combining component, the light splitting component and the Hartmann plate and then enter the second photoelectric detection component, detecting a light spot array projected by the Hartmann plate by the second photoelectric detection component, and taking the position of the light spot array as a reference position for subsequent position adjustment and focal power calculation of the measured lens; then closing a second light source component, opening the first light source component, transmitting a light beam output by the first light source component along the direction of a first optical axis after being reflected by a first light combining component, dividing the light beam into two beams by a light dividing component, projecting one beam onto a second reflector and returning the beam along the original path after being reflected by the second reflector, projecting the other beam onto a Hartmann plate and returning the beam along the original path after being reflected by the upper surface of the Hartmann plate, enabling the two returned light beams to enter a first photoelectric detection component through the light dividing component for detecting an interference phenomenon, and recording the position d1 of the second reflector when the interference phenomenon occurs; then closing the first light source component, opening the second light source component, moving into the measured lens, monitoring the projected actual light spot array by the second photoelectric detection component, calculating the center position of the lens at the moment according to the deviation of the position of the actual light spot array and the reference position obtained in the step (1), and then guiding a user to adjust the position of the measured lens to enable the center of the measured lens to coincide with the center of the light path, namely completing the position adjustment of the measured lens; meanwhile, the focal power of the measured lens can be calculated according to the deviation between the position of the actual light spot array and the reference position obtained in the step (1); then closing a second light source component, opening a first light source component, readjusting the position of a second reflector, recording the position D2 of the second reflector when the interference phenomenon occurs again in the first photoelectric detection component, wherein the difference value between D2 and D1 is related to the central optical thickness of the lens, meanwhile, light beams output by the first light source component are focused at the measured lens by a first focusing component, light scattering is generated on the upper surface and the lower surface of the measured lens, scattered light on the upper surface and the lower surface of the measured lens is imaged by a first imaging component and a second imaging component respectively, the space height measurement of scattering light spots on the upper surface and the lower surface of the measured lens is realized, and the space height difference of the scattering light spots on the upper surface and the lower surface of the measured lens is the central physical thickness D0 of; then, the refractive index of the measured lens is calculated according to the lens center physical thickness D0 and the lens center optical thickness related parameters D1 and D2, and the calculation formula is as follows: n is 1+ (D2-D1)/D0.

The utility model discloses a third technical solution to second technical problem is: a device for detecting the refractive index of a lens is characterized in that: the lens central physical thickness detection module comprises a first imaging component and a second imaging component, the lens central optical thickness detection module comprises a first photoelectric detection component, a second photoelectric detection component, a light splitting component, a Hartmann plate and a movable second reflector, the second photoelectric detection component, the Hartmann plate, the light splitting component, the first focusing component, the first light combining component and the first light source component are sequentially arranged from front to back along a first optical axis direction, the second reflector is arranged on one side of the light splitting component, the first photoelectric detection component is arranged on the other side of the light splitting component, the focal plane of the first focusing assembly is positioned between the light splitting assembly and the Hartmann plate and used for placing a measured lens, the first imaging assembly and the second imaging assembly are respectively arranged above and below the measured lens, the upper surface of the Hartmann plate is coated with a reflecting film for partially reflecting the light beam of the second light source assembly, and the lower surface of the Hartmann plate is provided with an array type light-transmitting hole; collimated light beams output by the first light source component are transmitted in the first optical axis direction after being transmitted through the first light combining component, are focused by the first focusing component at the tested lens, and simultaneously scattered light spots are generated on the upper surface and the lower surface of the tested lens and are detected by the first imaging component and the second imaging component; the third light source assembly is positioned on a back focus of the first focusing assembly, a light beam output by the third light source assembly is reflected by the second light combining assembly and the first light combining assembly in sequence, focused into a parallel light beam by the first focusing assembly and transmitted along the first optical axis direction, and the parallel light beam transmitted along the first optical axis direction by the third light source assembly is transmitted through the measured lens and the Hartmann plate and then detected by the second photoelectric detection assembly; collimated light beams output by the second light source component penetrate through the second light combining component and are transmitted along the direction of the first optical axis after being reflected by the first light combining component, the collimated light beams are divided into two beams through the light splitting component, one beam is projected onto the second reflector and is reflected by the second reflector and returned in the original path, the other beam is projected onto the Hartmann plate and is reflected by the upper surface of the Hartmann plate and returned in the original path, the other beam is also reflected into the first photoelectric detection component through the light splitting component, and the two returned beams enter the first photoelectric detection component and are used for detecting interference phenomena.

The working principle of the technical scheme is as follows:

before the measured lens moves in, closing the first light source component and the second light source component, opening the third light source component, detecting a light spot array transmitted by the Hartmann plate (30) by the second photoelectric detection component, and taking the position of the light spot array as a reference position for subsequent measured lens position adjustment and focal power calculation; closing the third light source component, opening the second light source component, detecting the interference phenomenon by the first photoelectric detection component, and recording the position d1 of the second reflecting mirror when the interference phenomenon occurs; closing the second light source component, opening the third light source component, moving into the measured lens, monitoring the projected actual light spot array by the second photoelectric detection component, calculating the center position of the lens at the moment according to the deviation of the position of the actual light spot array and the reference position obtained in the step (1), and guiding a user to adjust the position of the measured lens to enable the center of the measured lens to coincide with the center of the light path, thus completing the position adjustment of the measured lens; meanwhile, the focal power of the measured lens can be calculated according to the deviation between the position of the actual light spot array and the reference position obtained in the step (1); closing the third light source component, opening the first light source component, focusing the light beam output by the first light source component at the measured lens by the first focusing component, generating light scattering on the upper surface and the lower surface of the measured lens, respectively imaging the scattered light on the upper surface and the lower surface of the measured lens by the first imaging component and the second imaging component, and realizing the measurement of the space heights of the scattering light spots on the upper surface and the lower surface of the measured lens, wherein the space height difference of the scattering light spots on the upper surface and the lower surface of the measured lens is the physical thickness D0 of the center of the lens; turning off the first light source assembly, turning on the second light source assembly, readjusting the position of the second reflector and recording the position d2 of the second reflector when the interference phenomenon occurs again in the first photoelectric detection assembly, wherein the difference between d2 and d1 is related to the central optical thickness of the lens; finally, the refractive index of the measured lens (13) is calculated according to the lens center physical thickness D0 and the lens center optical thickness related parameters D1 and D2, and the calculation formula is as follows: n is 1+ (D2-D1)/D0.

The three technical schemes have the following beneficial effects:

the utility model discloses lens refracting index detection device is through detecting the space altitude difference and the interference phenomenon of the scattering facula that focus light beam produced on the measured lens upper and lower surface and obtaining the relevant parameter of calculation refracting index, need not to make the prism, also need not to detect the relevant angle of prism, and it is more convenient to operate, and shortened the detection cycle, can realize online quick detection; the optical element to be detected can not be damaged without manufacturing a prism, so that the method is also very suitable for detecting the finished lens; the detection of the spatial height difference and the interference phenomenon of the scattering light spots is also suitable for non-regular surface lenses such as aspheric lenses and cylindrical lenses; in addition, the Hartmann plate can correct whether the center of the lens to be detected is aligned with the center of the light path, and the focal power is detected according to the deviation condition of the light spot array detected by the Hartmann plate.

Description of the drawings:

fig. 1 is an optical schematic diagram of a device for detecting refractive index of a lens according to embodiment 1 of the present invention;

fig. 2 is an optical schematic diagram of a device for detecting refractive index of a lens according to embodiment 2 of the present invention;

fig. 3 is an optical schematic diagram of a device for detecting refractive index of a lens according to embodiment 3 of the present invention;

fig. 4 is an optical schematic diagram of a device for detecting refractive index of a lens according to embodiment 4 of the present invention;

FIG. 5 is a diagram of the conjugate relationship between the object and the image of the oblique lens according to the present invention;

FIG. 6 is a schematic structural view of the Hartmann plate of the present invention;

fig. 7 is another schematic structural diagram of the hartmann panel of the present invention;

in the figure, the optical axis of the light source is 1-a first light source component, 2-a second light source component, 3-a third light source component, 4-a first focusing component, 5-a second focusing component, 6-a first imaging component, 7-a second imaging component, 8-a first photoelectric detection component, 9-a second photoelectric detection component, 10-a light splitting component, 11-a first reflector, 12-a second reflector, 13-a measured lens, 14-a first light combining component, 15-a first monochromatic L ED test light source, 16-a second monochromatic L ED test light source, 17-a first light hole, 18-a second light hole, 19-a first collimating lens, 20-a second collimating lens, 21-a first light splitting lens, 22-a second light splitting lens, 23-a third light splitting lens, 24-a fourth light splitting lens, 25-a focusing lens, 26-an oblique image lens, 27-a camera frame, 28-a second light combining component, 30-a Hartmann plate, 31-a light splitting hole array, 32-a light splitting film, a plane-B plane reflection film, a plane reflection optical axis direction and a direction of a second optical axis.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and embodiments.

Example 1:

a device for detecting the refractive index of a lens comprises a light source module, a lens center physical thickness detection module and a lens center optical thickness detection module, wherein the light source module comprises a first light source component 1 for outputting a collimated light beam and a first focusing component 4, the lens center physical thickness detection module comprises a first imaging component 6 and a second imaging component 7, the lens center optical thickness detection module comprises a first photoelectric detection component 8, a second photoelectric detection component 9, a light splitting component 10, a first reflecting mirror 11 for partial reflection and a movable second reflecting mirror 12, the second photoelectric detection component 9, the first reflecting mirror 11, the light splitting component 10, the first focusing component 4 and the first light source component 1 are sequentially arranged from front to back along a first optical axis direction A, the movable second reflecting mirror 12 is arranged on one side of the light splitting component 10, the first photoelectric detection component 8 is arranged on the other side of the light splitting component 10, the focal plane of the first focusing assembly 4 is located between the beam splitting assembly 10 and the first reflector 11 for placing the measured lens 13, the first imaging assembly 6 and the second imaging assembly 7 are respectively arranged above and below the measured lens 13, the collimated light beam transmitted by the first light source assembly 1 along the first optical axis direction a is focused at the measured lens 13 through the first focusing assembly 4, meanwhile, the upper and lower surfaces of the measured lens 13 generate scattering light spots and are detected by the first imaging assembly 6 and the second imaging assembly 7, the light beam focused by the first light source assembly 1 is further partially transmitted into the second photoelectric detection assembly 9 through the first reflector 11, the light beam transmitted by the first light source assembly 1 along the first optical axis direction a is further split into two light beams through the beam splitting assembly 10, one of the light beams is projected onto the second reflector 12 and is reflected by the second reflector 12 and returned as it is, and further transmitted into the first photoelectric detection assembly 8 through the beam splitting assembly 10, the other beam is projected onto the first reflector 11, reflected by the first reflector 11 and returned in the original path, and is also reflected to the first photoelectric detection assembly 8 through the light splitting assembly 10, and the two returned beams enter the first photoelectric detection assembly 8 for detecting the interference phenomenon.

The light reflectivity of the first reflector 11 is greater than the light transmissivity, the second focusing assembly 5 is further arranged between the first reflector 11 and the second photoelectric detection assembly 9 and used for converging the light beams transmitted by the first light source assembly 1 through the first reflector 11, and the light reflectivity and the light transmissivity are both the light beams emitted by the first light source assembly 1. The second focusing assembly 5 is arranged to enhance the transmitted light which is originally weak in light intensity, so that the transmitted light can be reliably focused into the second photoelectric detection assembly 9 for correcting the center position of the lens.

The light reflectivity of the first reflector 11 is 80% -90%, and the light transmissivity is 10% -20%. This arrangement can ensure both the interference phenomenon and the light intensity required for the lens position detection.

The first light source assembly 1 comprises a first monochromatic L ED test light source 15, the first monochromatic L ED test light source 15 can be in a chip package form, the first monochromatic L ED test light source 15 can be 530nm or 540nm green light, 450nm or 480nm blue light, 610nm or 630nm red light and the like, the refractive index of the first monochromatic L ED test light source 15 at which wavelength can be tested, a first light transmission hole 17 is arranged in front of the first monochromatic L ED test light source 15, a first collimating lens 19 is arranged in front of the first light transmission hole 17, the first monochromatic L ED test light source 15 is arranged at the rear focal point of the first collimating lens 19 and used for converting a light beam emitted by the first monochromatic L ED test light source 15 through the first light transmission hole 17 into a collimated light beam to be projected onto the first focusing assembly 4 after passing through the first collimating lens 19, the first monochromatic L ED test light source 15 is low in cost and low in energy consumption, the first light source 15 can be converted into a safer monochromatic collimated light beam by using, and the first light source 15 can be coupled into a more reliable light path for testing.

The light splitting component 10 comprises a transflective first light splitting sheet 21, the first focusing component 4 comprises a focusing lens 25, the center of the first light splitting sheet 21, the center of the focusing lens 25, the center of the first collimating lens 19, the center of the first light transmitting hole 17 and the center of the first monochromatic L ED test light source 15 are all located in a first optical axis direction A, the center of the second reflector 12, the center of the first light splitting sheet 21 and the center of the first photoelectric detection component 8 are all located in a second optical axis direction B perpendicular to the first optical axis direction A, when the second reflector 12 is located on the left side of the first light splitting sheet 21, the included angle between the side surface of the first light splitting sheet 21 and the second optical axis direction B is 45 degrees, and when the second reflector 12 is located on the right side of the first light splitting sheet 21, the included angle between the side surface of the first light splitting sheet 21 and the second optical axis direction B is 135 degrees.

The first imaging component 6 and the second imaging component 7 are both cameras 27 with oblique imaging lenses 26, an included angle between the optical axis direction of the oblique imaging lenses 26 and the first optical axis direction a and an included angle between the optical axis direction of the oblique imaging lenses 26 and the imaging chip plane of the camera 27 satisfy the conjugate relationship of the object image formed by the oblique imaging lenses, as shown in fig. 5, 33 represents an object plane, 34 represents an image plane, 34 represents an imaging chip plane, i.e. the first imaging component 6 or the second imaging component 7, the scattered light generated by the focused light beams output by the first light source component 1 on the upper and lower surfaces of the measured lens 13 is focused and imaged on the imaging chip planes of the two cameras 27 through the two oblique imaging lenses 26, the first imaging component 6 is used for measuring the spatial height of the intersection point of the focused light beams of the first light source component 1 and the upper surface of the measured lens 13, and the second imaging component 7 is used for measuring the spatial height of the intersection point of the focused light beams of the first light source component 1 and the lower surface of the measured lens 13 And the space height difference of the intersection point of the upper surface and the lower surface is the central physical thickness D0 of the lens. The oblique image lens 26 has better imaging effect and more accurate acquired image.

The first photoelectric detection component 8 is an area-array camera 27, a line-array camera 27 or a photodiode. This arrangement makes the detection of the interference phenomenon more accurate.

The second photo-detection assembly 9 is a position sensitive detector or an area-array camera 27. This arrangement can make the lens position calibration more accurate.

And the lens bracket 28 is arranged close to the focal plane of the first focusing assembly 4, and the motor is used for driving the lens bracket 28 to move left and right and is used for driving the measured lens 13 arranged on the lens bracket 28 to move automatically. The device can drive the tested lens 13 mounted on the lens frame 28 to move automatically, and the operation is more convenient and the position control is more accurate.

In this embodiment, the spectral width of the first monochromatic L ED test light source 15 is 10nm to 50nm, the central wavelength is 546nm, the diameter of the first light hole 17 is less than 0.5mm, preferably, the diameter of the first light hole 17 is less than 0.2mm, for example, 0.15mm, the distance between the first light hole 17 and the first monochromatic L ED test light source 15 is less than 0.5mm, for example, 0.2mm, the focal length of the first collimating lens 19 is greater than 50mm, preferably, the focal length of the first collimating lens 19 is greater than 100mm, the focal length of the focusing lens 25 is greater than 50mm, preferably, the focal length of the focusing lens 25 is greater than 100mm, for example, 120mm, the transmission-reflection ratio of the first splitter 21 to the light beam of the first monochromatic L ED test light source 15 is 1:1, the light reflectivity of the first reflector 11 is 80% -90%, and the light transmissivity is 10% -20%.

The utility model discloses lens refracting index detection device theory of operation as follows:

before the measured lens 13 is placed, the first light source assembly 1 is opened, collimated light beams emitted by the first light source assembly 1 are focused by the first focusing assembly 4 and partially transmitted out through the first reflector 11 and projected into the second photoelectric detection assembly 9, and the second photoelectric detection assembly 9 monitors the spot center position of the projected light beams and uses the spot center position as a reference position for subsequent position adjustment of the measured lens 13; putting the measured lens 13, monitoring the actual light spot center position of the projected light beam by the second photoelectric detection component 9, comparing the actual light spot center position with the previously obtained reference position, guiding a user to adjust the position of the measured lens 13 according to the deviation of the actual light spot center position and the reference position, and when the actual light spot center position is superposed with the reference position, superposing the center of the measured lens 13 with the center of the light path, namely finishing the position adjustment of the measured lens 13; meanwhile, collimated light beams emitted by the first light source component 1 are focused at the measured lens 13 through the first focusing component 4, light scattering is generated on the upper surface and the lower surface of the measured lens 13, scattered light on the upper surface and the lower surface of the measured lens 13 is imaged by the first imaging component 6 and the second imaging component 7 respectively, the space height measurement of scattered light spots on the upper surface and the lower surface of the measured lens 13 is realized, and the space height difference of the scattered light spots on the upper surface and the lower surface of the measured lens 13 is the lens center physical thickness D0; in addition, the light beam emitted by the first light source assembly 1 is split into two beams by the beam splitting assembly 10, one beam is projected onto the second reflector 12 and reflected by the second reflector 12 to return to the original path, the other beam is projected onto the first reflector 11 and reflected by the first reflector 11 to return to the original path, the two returned beams enter the first photoelectric detection assembly 8 through the beam splitting assembly 10, the second reflector 12 is moved to a proper position, namely, the optical path from the light beam emitted by the first light source assembly 1 to the second reflector 12 and the optical path from the light beam emitted by the first light source assembly 1 to the first reflector 12When the optical paths of the light beams 11 are completely equal, the light beam reflected by the second reflecting mirror 12 and the light beam reflected by the first reflecting mirror 11 will generate an interference phenomenon in the first photoelectric detection assembly 8, before the first photoelectric detection assembly 8 is placed into the measured lens 13, the position d1 of the second reflecting mirror 12 when the interference phenomenon occurs in the first photoelectric detection assembly 8 is recorded, after the measured lens 13 is placed into the measured lens 13, the position of the second reflecting mirror 12 is readjusted, the position d2 of the second reflecting mirror 12 when the interference phenomenon occurs again in the first photoelectric detection assembly 8 is recorded, and the difference between d2 and d1 is related to the optical thickness of the center of the lens; then, the refractive index of the measured lens 13 is calculated according to the lens center physical thickness D0 and the lens center optical thickness related parameters D1 and D2, and the calculation formula is as follows:

the utility model discloses lens refracting index detection device is through detecting the space altitude difference and the interference phenomenon of the scattering facula that focus light beam produced at survey lens 13 upper and lower surface and obtain the relevant parameter of calculation refracting index, need not to make the prism, also need not to detect the relevant angle of prism, and it is more convenient to operate, and shortened detection cycle, can realize online quick detection; the optical element to be detected can not be damaged without manufacturing a prism, so that the method is also very suitable for detecting the finished lens; and the detection of the spatial height difference and the interference phenomenon of the scattering light spots is also suitable for non-regular surface lenses such as aspheric lenses and cylindrical lenses.

The detection process of the device for detecting the refractive index of the lens in the embodiment is as follows:

(1) before inserting the measured lens 13, opening the first light source assembly 1, monitoring the light spot center position of the light beam of the first light source assembly 1 by the second photoelectric detection assembly 9, and taking the light spot center position as a reference position;

(2) detecting the interference phenomenon by the first photodetection assembly 8 and recording the position d1 of the second reflecting mirror 12 when the interference phenomenon occurs in the first photodetection assembly 8;

(3) inserting the measured lens 13, monitoring the actual light spot center position of the light beam of the first light source component 1 by the second photoelectric detection component 9, comparing the actual light spot center position with the reference position obtained in the step (1), guiding a user to adjust the position of the measured lens 13 according to the deviation of the actual light spot center position and the reference position, and when the actual light spot center position of the light beam of the first light source component 1 is superposed with the reference position, superposing the center of the measured lens 13 with the center of the light path to complete the position adjustment of the measured lens 13;

(4) the first imaging component 6 and the second imaging component 7 respectively image the scattered light on the upper surface and the lower surface of the measured lens 13 to realize the measurement of the spatial height of the scattered light spots on the upper surface and the lower surface of the measured lens 13, and the spatial height difference of the scattered light spots on the upper surface and the lower surface of the measured lens 13 is the physical thickness D0 of the lens center;

(5) readjusting the position of the second mirror 12 and recording the position d2 of the second mirror 12 when the interference phenomenon occurs again in the first photodetection assembly 8;

(6) calculating the refractive index of the measured lens 13 according to the lens center physical thickness D0 and the lens center optical thickness related parameters D1 and D2, wherein the calculation formula is as follows:

example 2:

a device for detecting the refractive index of a lens comprises a light source module, a lens center physical thickness detection module and a lens center optical thickness detection module, wherein the light source module comprises a first light source component 1 for outputting a collimated light beam, a removable first focusing component 4, the lens center physical thickness detection module comprises a first imaging component 6 and a second imaging component 7, the lens center optical thickness detection module comprises a first photoelectric detection component 8, a second photoelectric detection component 9, a light splitting component 10, a Hartmann plate 30 and a movable second reflecting mirror 12, the second photoelectric detection component 9, the Hartmann plate 30, the light splitting component 10, the removable first focusing component 4 and the first light source component 1 are sequentially arranged from front to back along a first optical axis direction A, a reflecting film 32 is coated on the upper surface of the Hartmann plate 30 and used for partially reflecting the light beam of the first light source component 1, the lower surface of the hartmann plate 30 is provided with an array type light hole 31 for projecting a light spot array to the second photoelectric detection component 9, the movable second reflector 12 is arranged at one side of the light splitting component 10, the first photoelectric detection component 8 is arranged at the other side of the light splitting component 10, the focal plane of the first focusing component 4 is positioned between the light splitting component 10 and the hartmann plate 30 for placing the measured lens 13, the first imaging component 6 and the second imaging component 7 are respectively arranged above and below the measured lens 13, when the first focusing component 4 is removed, the collimated light beam transmitted by the first light source component 1 along the first optical axis direction a is projected onto the measured lens 13 and the hartmann plate 30 after passing through the light splitting component 10 and enters the second photoelectric detection component 9, and the second photoelectric detection component 9 detects the light spot array projected by the hartmann plate 30, after the first focusing assembly 4 is inserted, the collimated light beam transmitted by the first light source assembly 1 along the first optical axis direction a is transmitted through the light splitting assembly 10 and focused by the first focusing assembly 4 at the measured lens 13, scattering light spots are generated on the upper surface and the lower surface of the measured lens 13 and are detected by the first imaging component 6 and the second imaging component 7, in addition, the light beam transmitted by the first light source assembly 1 along the first optical axis direction a is further split into two beams by the light splitting assembly 10, one beam is projected onto the second reflecting mirror 12 and reflected by the second reflecting mirror 12 to return to the original path, and further transmitted to the first photoelectric detection assembly 8 by the light splitting assembly 10, the other beam is projected onto the Hartmann plate 30 and reflected by the upper surface of the Hartmann plate 30 to return in the original path, and is also reflected to the first photoelectric detection assembly 8 through the light splitting assembly 10, the two returned light beams both enter the first photoelectric detection assembly 8 through the light splitting assembly 10 for detecting the interference phenomenon.

The first imaging component 6 and the second imaging component 7 are both a camera 27 with an oblique imaging lens 26, and an included angle between the optical axis direction of the oblique imaging lens 26 and the first optical axis direction A and an included angle between the optical axis direction of the oblique imaging lens 26 and the imaging chip plane of the camera 27 meet the object image conjugate relation of oblique imaging of the imaging lens. The oblique image lens 26 has better imaging effect and more accurate acquired image.

The second photo-detection assembly 9 is a position sensitive detector or an area-array camera 27. This arrangement allows for more accurate lens position calibration and power calculation.

The present embodiment has the following differences compared with the device for detecting refractive index of lens in embodiment 1: 1. the first focusing assembly 4 becomes a removable structure, removable by electronically controlled translation or rotation; 2. the first mirror 11 becomes a hartmann plate 30; 3. the second focusing assembly 5 is eliminated.

In this embodiment, the spectral width of the first monochromatic L ED test light source 15 is 10nm to 50nm, the central wavelength is 546nm, the diameter of the first light transmission hole 17 is less than 0.5mm, preferably, the diameter of the first light transmission hole 17 is less than 0.2mm, for example, 0.15mm, the distance between the first light transmission hole 17 and the first monochromatic L ED test light source 15 is less than 0.5mm, for example, 0.2mm, the focal length of the first collimating lens 19 is greater than 50mm, preferably, the focal length of the first collimating lens 19 is greater than 100mm, the focal length of the focusing lens 25 is greater than 50mm, preferably, the focal length of the focusing lens 25 is greater than 100mm, for example, 120mm, the transmittance-reflectance ratio of the first light splitter 21 to the light beam of the first monochromatic L ED test light source 15 is 1:1, the structure of the hartmann plate 30 is as shown in fig. 6 and 7, a partial reflective film 32 is plated on the upper surface, and the reflectance of the lower surface of the 500-600nm light source is 80% -90%, an array circular metal film is plated to form an array, the array circular hole, the array of the light transmission holes, the row and the diameter of the light transmission holes is greater than 0.5mm, and the diameter of the central circular hole is greater than the diameter of the remaining circular hole of the other circular hole of the array circular hole.

before the measured lens 13 and the first focusing assembly 4 move in, the first light source assembly 1 is opened, collimated light beams transmitted by the first light source assembly 1 along the first optical axis direction A sequentially transmit the light splitting assembly 10 and the Hartmann plate 30 and then enter the second photoelectric detection assembly 9, the second photoelectric detection assembly 9 detects a light spot array projected by the Hartmann plate 30, and the position of the light spot array is used as a reference position for subsequent position adjustment of the measured lens 13 and power calculation; then moved into the first focusing assembly 4, the first light sourceAfter passing through the first focusing assembly 4, a light beam transmitted by the assembly 1 along the first optical axis direction a is divided into two beams by the light splitting assembly 10, one beam is projected onto the second reflecting mirror 12 and reflected by the second reflecting mirror 12 to return to the original path, the other beam is projected onto the hartmann plate 30 and reflected by the upper surface of the hartmann plate 30 to return to the original path, the two returned light beams enter the first photoelectric detection assembly 8 through the light splitting assembly 10 to be used for detecting an interference phenomenon, and the position d1 of the second reflecting mirror 12 when the interference phenomenon occurs is recorded; removing the first focusing component 4, moving the first focusing component into the measured lens 13, monitoring the projected actual light spot array by the second photoelectric detection component 9, calculating the center position of the lens at the moment according to the deviation of the position of the actual light spot array and the reference position obtained in the step (1), and guiding a user to adjust the position of the measured lens 13 to enable the center of the measured lens 13 to coincide with the center of the light path, namely completing the position adjustment of the measured lens 13; meanwhile, the focal power of the measured lens 13 can be calculated according to the deviation between the position of the actual light spot array and the reference position obtained in the step (1), and the central position and the focal power of the lens can be calculated by utilizing the deviation between the position of the actual light spot array and the reference position in the prior art; then moving into the first focusing assembly 4, readjusting the position of the second reflecting mirror 12, and recording the difference value between the position D2 of the second reflecting mirror 12 and the D2 and D1 when the interference phenomenon occurs again in the first photoelectric detection assembly 8, wherein the collimated light beam transmitted by the first light source assembly 1 along the first optical axis direction a also passes through the light splitting assembly 10 and is focused at the measured lens 13 by the first focusing assembly 4, and generates light scattering on the upper surface and the lower surface of the measured lens 13, and the first imaging assembly 6 and the second imaging assembly 7 respectively image the scattered light on the upper surface and the lower surface of the measured lens 13, so as to realize the spatial height measurement of the scattering light spots on the upper surface and the lower surface of the measured lens 13, and the spatial height difference of the scattering light spots on the upper surface and the lower surface of the measured lens 13 is the lens central physical thickness D0; then, the refractive index of the measured lens 13 is calculated according to the lens center physical thickness D0 and the lens center optical thickness related parameters D1 and D2, and the calculation formula is as follows:

the utility model discloses lens refracting index detection device is through detecting the space altitude difference and the interference phenomenon of the scattering facula that focus light beam produced at survey lens 13 upper and lower surface and obtain the relevant parameter of calculation refracting index, need not to make the prism, also need not to detect the relevant angle of prism, and it is more convenient to operate, and shortened detection cycle, can realize online quick detection; the optical element to be detected can not be damaged without manufacturing a prism, so that the method is also very suitable for detecting the finished lens; the detection of the spatial height difference and the interference phenomenon of the scattering light spots is also suitable for non-regular surface lenses such as aspheric lenses and cylindrical lenses; the Hartmann plate 30 is also used to correct whether the center of the lens to be measured is aligned with the center of the optical path, and the focal power of the lens is detected according to the deviation condition of the light spot array detected by the Hartmann plate 30.

(1) before the measured lens 13 and the first focusing assembly 4 move in, the first light source assembly 1 is opened, the second photoelectric detection assembly 9 detects the light spot array projected by the Hartmann plate 30, and the position of the light spot array is used as a reference position for subsequent position adjustment and focal power calculation of the measured lens 13;

(2) moving into the first focusing assembly 4, detecting the interference phenomenon by the first photoelectric detection assembly 8, and recording the position d1 of the second reflecting mirror 12 when the interference phenomenon occurs;

(3) removing the first focusing component 4, moving the first focusing component into the measured lens 13, monitoring the projected actual light spot array by the second photoelectric detection component 9, calculating the center position of the lens at the moment according to the deviation of the position of the actual light spot array and the reference position obtained in the step (1), and guiding a user to adjust the position of the measured lens 13 to enable the center of the measured lens 13 to coincide with the center of the light path, namely completing the position adjustment of the measured lens 13; meanwhile, the focal power of the measured lens 13 can be calculated according to the deviation between the position of the actual light spot array and the reference position obtained in the step (1);

(4) moving into the first focusing component 4, readjusting the position of the second reflector 12, recording the position D2 of the second reflector 12 when the interference phenomenon occurs again in the first photoelectric detection component 8, and simultaneously imaging the scattered light on the upper surface and the lower surface of the measured lens 13 by the first imaging component 6 and the second imaging component 7 respectively to realize the measurement of the spatial height of the scattered light spots on the upper surface and the lower surface of the measured lens 13, wherein the spatial height difference of the scattered light spots on the upper surface and the lower surface of the measured lens 13 is the lens center physical thickness D0;

(5) calculating the refractive index of the measured lens 13 according to the lens center physical thickness D0 and the lens center optical thickness related parameters D1 and D2, wherein the calculation formula is as follows:

example 3:

a device for detecting the refractive index of a lens comprises a light source module, a lens center physical thickness detection module and a lens center optical thickness detection module, wherein the light source module comprises a first light source component 1 and a second light source component 2 for outputting collimated light beams, a first focusing component 4 and a first light combining component 14, the lens center physical thickness detection module comprises a first imaging component 6 and a second imaging component 7, the lens center optical thickness detection module comprises a first photoelectric detection component 8, a second photoelectric detection component 9, a light splitting component 10, a Hartmann plate 30 and a movable second reflector 12, the second photoelectric detection component 9, the Hartmann plate 30, the light splitting component 10, the first light combining component 14 and the second light source component 2 are sequentially arranged from front to back along a first optical axis direction A, the first light source component 1 is arranged on one side of the first light combining component 14, the first focusing assembly 4 is arranged between the first light source assembly 1 and the first light combining assembly 14, the upper surface of the hartmann plate 30 is coated with a reflective film 32 for partially reflecting the light beam of the first light source assembly 1, the lower surface of the hartmann plate 30 is provided with an array type light-transmitting hole 31 for projecting a light spot array to the second photoelectric detection assembly 9, the movable second reflector 12 is arranged at one side of the light splitting assembly 10, the first photoelectric detection assembly 8 is arranged at the other side of the light splitting assembly 10, the focal plane of the first focusing assembly 4 is arranged between the light splitting assembly 10 and the hartmann plate 30 for placing the measured lens 13, the first imaging assembly 6 and the second imaging assembly 7 are respectively arranged above and below the measured lens 13, the light beam output by the first light source assembly 1 is reflected by the first light combining assembly 14 and then transmitted along the first optical axis direction a, the first focusing component 4 focuses on the measured lens 13, the upper and lower surfaces of the measured lens 13 generate scattering light spots and are detected by the first imaging component 6 and the second imaging component 7, meanwhile, the light beam transmitted by the first light source component 1 along the first optical axis direction a is further split into two beams by the beam splitting component 10, one beam is projected onto the second reflecting mirror 12 and reflected by the second reflecting mirror 12 to return as it is, and further transmitted into the first photoelectric detection component 8 by the beam splitting component 10, the other beam is projected onto the hartmann plate 30 and reflected by the upper surface of the hartmann plate 30 to return as it is, and is also reflected into the first photoelectric detection component 8 by the beam splitting component 10, the two returned light beams enter the first photoelectric detection component 8 for detecting interference phenomenon, and the collimated light beam transmitted by the second light source component 2 along the first optical axis direction a transmits through the first light combining component 14, the second imaging component 7, The beam splitting assembly 10, the measured lens 13 and the Hartmann plate 30 are transmitted to the second photoelectric detection assembly 9, and the second photoelectric detection assembly 9 detects the light spot array projected by the Hartmann plate 30.

The second light source assembly 2 comprises a second monochromatic L ED test light source 16, the second monochromatic L ED test light source 16 can be in a chip package form, the second monochromatic L ED test light source 16 can be green light of 530nm or 540nm, blue light of 450nm or 480nm, red light of 610nm or 630nm and the like, a second light hole 18 is arranged in front of the second monochromatic L ED test light source 16, a second collimating lens 20 is arranged in front of the second light hole 18, the second monochromatic L ED test light source 16 is arranged at the rear focal point of the second collimating lens 20 and used for converting light beams emitted by the second monochromatic L ED test light source 16 through the second light hole 18 into collimated light beams after passing through the second collimating lens 20, the second monochromatic L ED test light source 16 is low in cost, low in energy consumption and safer to use, and the second monochromatic L ED test light source 16 is converted into collimated light beams, so that light path coupling can be more reliable.

The light splitting component 10 comprises a transflective first light splitting sheet 21, the center of the second reflector 12, the center of the first light splitting sheet 21 and the center of the first photoelectric detection component 8 are all located in a second optical axis direction B perpendicular to the first optical axis direction a, when the second reflector 12 is located on the left side of the first light splitting sheet 21, the included angle between the side surface of the first light splitting sheet 21 and the second optical axis direction B is 45 degrees, and when the second reflector 12 is located on the right side of the first light splitting sheet 21, the included angle between the side surface of the first light splitting sheet 21 and the second optical axis direction B is 135 degrees. The device has the advantages of less required elements, simple structure and reliable optical path coupling.

The first light combining component 14 includes a semi-transmissive and semi-reflective second light splitter 22, the first focusing component 4 includes a focusing lens 25, the center of the first monochromatic L ED test light source 15, the center of the first light transmitting hole 17, the center of the first collimating lens 19, the center of the focusing lens 25, and the center of the second light splitter 22 are all located in a third optical axis direction C perpendicular to the first optical axis direction a, the center of the second monochromatic L ED test light source 16, the center of the second light transmitting hole 18, the center of the second collimating lens 20, and the center of the second light splitter 22 are all located in the first optical axis direction a, when the first monochromatic L ED test light source 15 is located on the left side of the second light splitter 22, an included angle between the side of the second light splitter 22 and the third optical axis direction C is 135 °, when the first monochromatic L ED test light source 15 is located on the right side of the second light splitter 22, an included angle between the side of the second light splitter 22 and the third optical axis direction C is 45 °, the first light combining component 14 is structured such that the first monochromatic L ED test light source 15 can output a light beam with a simple structure, and a single-pass through the first light beam, and the light source assembly can be detected reliably, and the detection can be performed.

The present embodiment has the following differences compared with the device for detecting refractive index of lens in embodiment 2: 1. the first focusing assembly 4 becomes a fixed structure; 2. the second light source component 2 is additionally arranged, the central position of the measured lens 13 is adjusted and the focal power is calculated by utilizing the second light source component 2, and the first light source component 1 is used for detecting the spatial height difference and the interference phenomenon of the scattering light spot and calculating the refractive index.

In this embodiment, the spectral width of the first monochromatic L ED test light source 15 is 10nm to 50nm, the central wavelength is 546nm, the spectral width of the second monochromatic L ED test light source 16 is 10nm to 50nm, the central wavelength is 546nm, the diameter of the first light transmission hole 17 is less than 0.5mm, preferably the diameter of the first light transmission hole 17 is less than 0.2mm, for example 0.15mm, the distance between the first light transmission hole 17 and the first monochromatic L ED test light source 15 is less than 0.5mm, for example 0.2mm, the diameter of the second light transmission hole 18 is less than 0.5mm, preferably the diameter of the second light transmission hole 18 is less than 0.2mm, the distance between the second light transmission hole 18 and the second monochromatic L ED test light source 16 is less than 0.5mm, for example 0.2mm, the focal length of the first collimating lens 19 is greater than 50mm, preferably the focal length of the first collimating lens 19 is greater than 100mm, the focal length of the second collimating lens 20 is greater than 50mm, preferably the focal length of the collimating lens 20 is greater than 1 mm, and the focal length of the focusing lens is greater than 1 mm.

before the measured lens 13 moves in, the first light source assembly 1 is closed, the second light source assembly 2 is opened, collimated light beams transmitted by the second light source assembly 2 along the first optical axis direction A enter the second photoelectric detection assembly 9 after passing through the first light combining assembly 14, the light splitting assembly 10 and the Hartmann plate 30, the second photoelectric detection assembly 9 detects a light spot array projected by the Hartmann plate 30, and the position of the light spot array is used as a reference position for subsequent position adjustment and focal power calculation of the measured lens 13; then, the second light source component 2 is closed, the first light source component 1 is opened, the collimated light beam transmitted by the first light source component 1 along the third optical axis direction C is reflected by the first light combining component 14 and then transmitted along the first optical axis direction a, the collimated light beam is divided into two beams by the light dividing component 10, one beam is projected onto the second reflecting mirror 12 and reflected by the second reflecting mirror 12 and returns along the original path, the other beam is projected onto the hartmann plate 30 and reflected by the upper surface of the hartmann plate 30 and returns along the original path, the two returned light beams enter the first photoelectric detection component 8 through the light dividing component 10 and are used for detecting an interference phenomenon, and the position d1 of the second reflecting mirror 12 when the interference phenomenon occurs is recorded; then the first light source component 1 is closed, the second light source component 2 is opened, and the measured lens 13 is moved in and monitored by the second photoelectric detection component 9Projecting an actual light spot array, calculating the center position of the lens at the moment according to the deviation between the position of the actual light spot array and the reference position obtained in the step (1), and guiding a user to adjust the position of the measured lens 13 so that the center of the measured lens 13 is superposed with the center of the light path, namely completing the position adjustment of the measured lens 13; meanwhile, the focal power of the measured lens 13 can be calculated according to the deviation between the position of the actual light spot array and the reference position obtained in the step (1), and the central position and the focal power of the lens can be calculated according to the deviation between the position of the actual light spot array and the reference position in the prior art; then, the second light source component 2 is closed, the first light source component 1 is opened, the position of the second reflector 12 is readjusted, the position D2 of the second reflector 12 when the interference phenomenon occurs again in the first photoelectric detection component 8 is recorded, the difference value between D2 and D1 is related to the central optical thickness of the lens, meanwhile, the light beam output by the first light source component 1 is focused at the measured lens 13 by the first focusing component 4, light scattering is generated on the upper surface and the lower surface of the measured lens 13, the first imaging component 6 and the second imaging component 7 respectively image the scattered light on the upper surface and the lower surface of the measured lens 13, the spatial height measurement of the scattered light spots on the upper surface and the lower surface of the measured lens 13 is realized, and the spatial height difference of the scattered light spots on the upper surface and the lower surface of the measured lens 13 is the central physical thickness D36; then, the refractive index of the measured lens 13 is calculated according to the lens center physical thickness D0 and the lens center optical thickness related parameters D1 and D2, and the calculation formula is as follows:

the detection steps of the device for detecting the refractive index of the lens in the embodiment are as follows:

(1) before the measured lens 13 moves in, the first light source component 1 is closed, the second light source component 2 is opened, the second photoelectric detection component 9 detects the light spot array projected by the Hartmann plate 30, and the position of the light spot array is used as a reference position for subsequent position adjustment and focal power calculation of the measured lens 13;

(2) closing the second light source assembly 2, opening the first light source assembly 1, detecting an interference phenomenon in the first photoelectric detection assembly 8, and recording the position d1 of the second reflecting mirror 12 when the interference phenomenon occurs;

(3) closing the first light source component 1, opening the second light source component 2, moving into the measured lens 13, monitoring the projected actual light spot array by the second photoelectric detection component 9, calculating the center position of the lens at the moment according to the deviation of the position of the actual light spot array and the reference position obtained in the step (1), and then guiding a user to adjust the position of the measured lens 13 to enable the center of the measured lens (13) to coincide with the center of the light path, namely completing the position adjustment of the measured lens 13; meanwhile, the focal power of the measured lens 13 can be calculated according to the deviation between the position of the actual light spot array and the reference position obtained in the step (1);

(4) closing the second light source component 2, opening the first light source component 1, readjusting the position of the second reflector 12, recording the position D2 of the second reflector 12 when the interference phenomenon occurs again in the first photoelectric detection component 8, wherein the difference value between D2 and D1 is related to the central optical thickness of the lens, meanwhile, the light beam output by the first light source component 1 is focused at the measured lens 13 by the first focusing component 4, and generates light scattering on the upper surface and the lower surface of the measured lens 13, the first imaging component 6 and the second imaging component 7 respectively image the scattered light on the upper surface and the lower surface of the measured lens 13, so as to realize the spatial height measurement of the scattered light spots on the upper surface and the lower surface of the measured lens 13, and the spatial height difference of the scattered light spots on the upper surface and the lower surface of the measured lens 13 is the central physical thickness D0 of;

example 4:

a device for detecting the refractive index of a lens comprises a light source module, a lens center physical thickness detection module and a lens center optical thickness detection module, wherein the light source module comprises a first light source component 1, a second light source component 2, a third light source component 3, a first light combining component 14, a second light combining component 29 and a first focusing component 4 which are used for outputting collimated light beams, the lens center physical thickness detection module comprises a first imaging component 6 and a second imaging component 7, the lens center optical thickness detection module comprises a first photoelectric detection component 8, a second photoelectric detection component 9, a light splitting component 10, a Hartmann plate 30 and a movable second reflecting mirror 12, the second photoelectric detection component 9, the Hartmann plate 30, the light splitting component 10, the first focusing component 4, the first light combining component 14 and the first light source component 1 are sequentially arranged from front to back along a first optical axis direction A, the second reflector 12 is arranged on one side of the light splitting component 10, the first photoelectric detection component 8 is arranged on the other side of the light splitting component 10, the focal plane of the first focusing component 4 is positioned between the light splitting component 10 and the Hartmann plate 30 and used for placing a measured lens 13, the first imaging component 6 and the second imaging component 7 are respectively arranged above and below the measured lens 13, the upper surface of the Hartmann plate 30 is coated with a reflective film 32 for partially reflecting the light beam of the second light source component 2, and the lower surface of the Hartmann plate 30 is provided with an array type light-transmitting hole 31; collimated light beams output by the first light source assembly 1 are transmitted along the first optical axis direction A after being transmitted through the first light combining assembly 14, and are focused at the measured lens 13 by the first focusing assembly 4, and meanwhile scattering light spots are generated on the upper surface and the lower surface of the measured lens 13 and are detected by the first imaging assembly 6 and the second imaging assembly 7; the third light source assembly 3 is located at a back focus of the first focusing assembly 4, a light beam output by the third light source assembly 3 is reflected by the second light combining assembly 29 and the first light combining assembly 14 in sequence, focused into a parallel light beam by the first focusing assembly 4 and transmitted along the first optical axis direction a, and after the parallel light beam transmitted by the third light source assembly 3 along the first optical axis direction a transmits through the measured lens 13 and the hartmann plate 30, a light spot array transmitted through the hartmann plate 30 is detected by the second photoelectric detection assembly 9; the collimated light beam output by the second light source component 2 transmits through the second light combining component 29 and is reflected by the first light combining component 14 and then transmitted along the first optical axis direction a, and then is divided into two beams by the light splitting component 10, one beam is projected onto the second reflector 12 and is reflected by the second reflector 12 and returns along the original path, and is further transmitted into the first photoelectric detection component 8 through the light splitting component 10, the other beam is projected onto the hartmann plate 30 and is reflected by the upper surface of the hartmann plate 30 and returns along the original path, and is also reflected into the first photoelectric detection component 8 through the light splitting component 10, and the two returned beams enter the first photoelectric detection component 8 for detecting the interference phenomenon.

The light splitting assembly 10 includes a transflective first light splitter 21, the center of the first photodetection assembly 8, the center of the first light splitter 21, and the center of the second reflector 12 are all located in a second optical axis direction B perpendicular to the first optical axis direction a, in this embodiment, the second reflector 12 is located on the right side of the first light splitter 21, an included angle between the side surface of the first light splitter 21 and the second optical axis direction B is 135 °, of course, the second reflector 12 may also be located on the left side of the first light splitter 21, and thus, an included angle between the side surface of the first light splitter 21 and the second optical axis direction B is 45 °. The device has the advantages of less required elements, simple structure and reliable optical path coupling.

The first light combining component 14 includes a semi-transparent and semi-reflective second light splitter 22, the second light source component 2 and the third light source component 3 are disposed on the same side of the second light splitter 22, and the second light combining component 29 includes a semi-transparent and semi-reflective third light splitter 23 disposed between the second light splitter 22 and the second light source component 2; the first light source assembly 1 is arranged behind the second light splitter 22, and collimated light beams output by the first light source assembly are projected onto the second light splitter 22 along the first optical axis direction a and then transmitted; collimated light beams output by the second light source component 2 are transmitted along a third optical axis direction C perpendicular to the first optical axis direction A, then are projected onto a third light splitter 23 to be transmitted, and are reflected by a second light splitter 22 to be transmitted along the first optical axis direction A; the light beam output by the third light source assembly 3 is transmitted along a fourth optical axis direction D perpendicular to the third optical axis direction C, and then is reflected by the third light splitter 23 and the second light splitter 22 in sequence and transmitted along the first optical axis direction a; when the second dichroic sheet 22 and the third dichroic sheet 23 are both at an angle of 45 ° with respect to the third optical axis direction C, the second light source assembly 2 is located on the right side of the second dichroic sheet 22, the third light source assembly 3 is located above the third optical axis direction C, when the second dichroic sheet 22 and the third dichroic sheet 23 are both at an angle of 135 ° with respect to the second optical axis direction B, the second light source assembly 2 is located on the left side of the second dichroic sheet 22, the third light source assembly 3 is located above the third optical axis direction C, when the second dichroic sheet 22 is at an angle of 45 ° with respect to the third optical axis direction C, the third dichroic sheet 23 is at an angle of 135 ° with respect to the third optical axis direction C, the second dichroic sheet 22 is located on the right side of the second dichroic sheet 22, the third light source assembly 3 is located below the third optical axis direction C, and when the second dichroic sheet 22 is at an angle of 135 ° with respect to the third optical axis direction C, and, the second light source assembly 2 is located at the left side of the second dichroic sheet 22 and the third light source assembly 3 is located below the third optical axis direction C. This first closes optical assembly 14 and second and closes optical assembly 29 simple structure for the collimated light beam of first light source subassembly 1 and second light source subassembly 2/third light source subassembly 3 output only needs can follow first optical axis direction A transmission through simple transmission and/or reflection, and the energy loss of light beam is little, is favorable to the accurate reliable of detection to go on.

The first light source assembly 1 includes a semiconductor laser, the semiconductor laser is disposed behind the second light splitter 22, and the collimated light beam output by the semiconductor laser is projected onto the second light splitter 22 along the first optical axis direction a and then is transmitted. The semiconductor laser has small volume, light weight, reliable operation, low power consumption and high efficiency.

The second light source assembly 2 comprises a first monochromatic L ED test light source 15, the first monochromatic L ED test light source 15 can be in a chip package form, the first monochromatic L ED test light source 15 can be 530nm or 540nm green light, 450nm or 480nm blue light, 610nm or 630nm red light and the like, the wavelength of the first monochromatic L ED test light source 15 can be tested, the refractive index at the wavelength can be tested, a first light transmission hole 17 is arranged in front of the first monochromatic L ED test light source 15, a first collimating lens 19 is arranged in front of the first light transmission hole 17, the first monochromatic L ED test light source 15 is arranged at the rear focal point of the first collimating lens 19 and used for converting light beams emitted by the first monochromatic L ED test light source 15 through the first light transmission hole 17 into collimated light beams after passing through the first collimating lens 19, light beams output by the first L ED test light source 15 are transmitted along a third light splitting direction perpendicular to a first light splitting direction A, the third light splitting direction ED test light source 15 is perpendicular to a third light splitting direction, the third light beam is transmitted along a third light splitting direction C, the third light splitting direction, the third light splitting lens 23 is used for converting the monochromatic L ED test light source 15, the light beam into a light beam, the third light beam is used for converting the third light splitting test light beam, and the third light beam, the third light splitting direction, the third light splitting test light beam, the third light beam is used for converting the third light splitting test light beam, the third.

The third light source assembly 3 comprises a second monochromatic L ED test light source 16, the second monochromatic L ED test light source 16 can be in a chip package form, the second monochromatic L ED test light source 16 can be the same as the first monochromatic L ED test light source 15, can be green light of 530nm or 540nm, can also be blue light of 450nm or 480nm, can also be red light of 610nm or 630nm, and the like, a second light-transmitting hole 18 is arranged in front of the second monochromatic L ED test light source 16, the second monochromatic L ED test light source 16 is arranged at the rear focal point of the first focusing assembly 4, and is used for converting light beams emitted by the second monochromatic L ED test light source 16 through the second light-transmitting hole 18 into collimated light beams after passing through the first focusing assembly 4, light beams output by the second monochromatic L ED test light source 16 are projected onto a third light-splitting sheet 23 along a fourth optical axis direction D perpendicular to a third optical axis direction C, and are reflected twice by a third light-splitting sheet 23 and a second light-splitting sheet 22 in turn, the second monochromatic L ED test light source 16 is positioned on a third light-transmitting direction C, and a second light-transmitting light beam is used for calculating a lower cost test light source 16 and a test light source 16.

The first focusing assembly 4 includes a focusing lens 25. The arrangement is simple.

In this embodiment, the collimated light beam output by the semiconductor laser has a diameter smaller than 3mm, such as 1.5mm, a wavelength larger than 650nm, the first monochromatic L ED test light source 15 has a spectral width of 10nm to 50nm and a center wavelength of 546nm, the second monochromatic L ED test light source 16 has a spectral width of 10nm to 50nm and a center wavelength of 546nm, the first light-transmitting hole 17 has a diameter smaller than 0.5mm, preferably the first light-transmitting hole 17 has a diameter smaller than 0.2mm, the first light-transmitting hole 17 is closer than 0.5mm, such as 0.2mm, the second light-transmitting hole 18 has a diameter smaller than 0.5mm, preferably the second light-transmitting hole 18 has a diameter smaller than 0.2mm, the second light-transmitting hole 18 is closer than 0.5mm, such as 0.2mm, the first collimating lens 19 has a focal length larger than 0.25 mm, the second collimating lens 18 has a focal length larger than 100mm, the focal length of the first collimating lens 19, the first collimating lens 18 is closer than 25 mm, the focal length of the first collimating lens 20mm, the focal length of the first light beam reflected by the first collimating lens 19, the first monochromatic light-transmitting hole 23 mm, the first light-transmitting lens 19 is closer to the first monochromatic light-transmitting lens 23 mm, the first monochromatic ED test light source 16, the focal length of the second light-transmitting lens 23 mm, the first monochromatic light-transmitting lens is equal to the first monochromatic test light-transmitting lens 23-transmitting light-transmitting lens, the first monochromatic test light.

The working principle of the device for detecting the refractive index of the lens in the embodiment is as follows:

before the measured lens 13 moves in, the first light source component 1 and the second light source component 2 are closed, the third light source component 3 is opened, the second photoelectric detection component 9 detects a light spot array transmitted by the Hartmann plate 30, and the position of the light spot array is used as a reference position for subsequent position adjustment and focal power calculation of the measured lens 13; turning off the third light source assembly 3, turning on the second light source assembly 2, detecting the interference phenomenon by the first photoelectric detection assembly 8, and recording the position d1 of the second reflecting mirror 12 when the interference phenomenon occurs; closing the second light source component 2, opening the third light source component 3, moving into the measured lens 13, monitoring the projected actual light spot array by the second photoelectric detection component 9, calculating the center position of the lens at the moment according to the deviation of the position of the actual light spot array and the reference position obtained in the step (1), and then guiding a user to adjust the position of the measured lens 13 to enable the center of the measured lens 13 to coincide with the center of the light path, thus completing the position adjustment of the measured lens 13; meanwhile, the focal power of the measured lens 13 can be calculated according to the deviation between the position of the actual light spot array and the reference position obtained in the step (1); the third light source component 3 is closed, the first light source component 1 is opened, light beams output by the first light source component 1 are focused at the measured lens 13 by the first focusing component 4, light scattering is generated on the upper surface and the lower surface of the measured lens 13, scattered light on the upper surface and the lower surface of the measured lens 13 is imaged by the first imaging component 6 and the second imaging component 7 respectively, the spatial height measurement of scattering light spots on the upper surface and the lower surface of the measured lens 13 is realized, and the spatial height difference of the scattering light spots on the upper surface and the lower surface of the measured lens 13 is the lens center physical thickness D0; turning off the first light source assembly 1, turning on the second light source assembly 2, readjusting the position of the second reflecting mirror 12 and recording the position d2 of the second reflecting mirror 12 when the interference phenomenon occurs again in the first photodetection assembly 8, wherein the difference between d2 and d1 is related to the optical thickness of the center of the lens; calculating the refractive index of the measured lens 13 according to the lens center physical thickness D0 and the lens center optical thickness related parameters D1 and D2, wherein the calculation formula is as follows: n is 1+ (D2-D1)/D0.

(1) before the measured lens 13 moves in, the first light source component 1 and the second light source component 2 are closed, the third light source component 3 is opened, the second photoelectric detection component 9 detects a light spot array transmitted by the Hartmann plate 30, and the position of the light spot array is used as a reference position for subsequent position adjustment and focal power calculation of the measured lens 13;

(3) turning off the third light source assembly 3, turning on the second light source assembly 2, detecting the interference phenomenon by the first photoelectric detection assembly 8, and recording the position d1 of the second reflecting mirror 12 when the interference phenomenon occurs;

(4) closing the second light source component 2, opening the third light source component 3, moving into the measured lens 13, monitoring the projected actual light spot array by the second photoelectric detection component 9, calculating the center position of the lens at the moment according to the deviation of the position of the actual light spot array and the reference position obtained in the step (1), and then guiding a user to adjust the position of the measured lens 13 to enable the center of the measured lens 13 to coincide with the center of the light path, thus completing the position adjustment of the measured lens 13; meanwhile, the focal power of the measured lens 13 can be calculated according to the deviation between the position of the actual light spot array and the reference position obtained in the step (1);

(5) the third light source component 3 is closed, the first light source component 1 is opened, light beams output by the first light source component 1 are focused at the measured lens 13 by the first focusing component 4, light scattering is generated on the upper surface and the lower surface of the measured lens 13, scattered light on the upper surface and the lower surface of the measured lens 13 is imaged by the first imaging component 6 and the second imaging component 7 respectively, the spatial height measurement of scattering light spots on the upper surface and the lower surface of the measured lens 13 is realized, and the spatial height difference of the scattering light spots on the upper surface and the lower surface of the measured lens 13 is the lens center physical thickness D0;

(6) turning off the first light source assembly 1, turning on the second light source assembly 2, readjusting the position of the second reflecting mirror 12 and recording the position d2 of the second reflecting mirror 12 when the interference phenomenon occurs again in the first photodetection assembly 8, wherein the difference between d2 and d1 is related to the optical thickness of the center of the lens;

(7) calculating the refractive index of the measured lens 13 according to the lens center physical thickness D0 and the lens center optical thickness related parameters D1 and D2, wherein the calculation formula is as follows: n is 1+ (D2-D1)/D0.

Claims

1. A device for detecting the refractive index of a lens is characterized in that: the device comprises a light source module, a lens center physical thickness detection module and a lens center optical thickness detection module, wherein the light source module comprises a first light source component (1) for outputting collimated light beams and a first focusing component (4), the lens center physical thickness detection module comprises a first imaging component (6) and a second imaging component (7), the lens center optical thickness detection module comprises a first photoelectric detection component (8), a second photoelectric detection component (9), a light splitting component (10), a partially-reflected first reflector (11) and a movable second reflector (12), the second photoelectric detection component (9), the first reflector (11), the light splitting component (10), the first focusing component (4) and the first light source component (1) are sequentially arranged from front to back along a first optical axis direction (A), and the movable second reflector (12) is arranged on one side of the light splitting component (10), the utility model discloses a photoelectric detection system, including first photoelectric detection subassembly (8), first focusing component (4), first formation of image subassembly (6) and second formation of image subassembly (7), first light source subassembly (1) is focused on measuring lens (13) through first focusing component (4) in measuring lens (13) department simultaneously, and the upper and lower surface of measuring lens (13) produce the scattered facula and are detected by first formation of image subassembly (6) and second formation of image subassembly (7), the light beam after first light source subassembly (1) focus still passes through first reflector (11) part to in second photoelectric detection subassembly (9), the light beam that first light source subassembly (1) transmitted along first direction (A) still passes through light splitting component (10) The two beams are divided into two beams, one beam is projected onto the second reflector (12) and reflected by the second reflector (12) and returns in the original path, further transmitted into the first photoelectric detection assembly (8) through the light splitting assembly (10), the other beam is projected onto the first reflector (11) and reflected by the first reflector (11) and returns in the original path, and is also reflected into the first photoelectric detection assembly (8) through the light splitting assembly (10), and the two returned beams enter the first photoelectric detection assembly (8) for detecting the interference phenomenon.

2. The device for detecting refractive index of lens according to claim 1, wherein: the light reflectivity of the first reflecting mirror (11) is greater than the light transmissivity, a second focusing assembly (5) is further arranged between the first reflecting mirror (11) and the second photoelectric detection assembly (9) and used for converging light beams transmitted by the first reflecting mirror (11) through the first light source assembly (1), and the light reflectivity and the light transmissivity are both light beams emitted by aiming at the first light source assembly (1).

3. The device for detecting the refractive index of a lens according to claim 1, wherein the first light source assembly (1) comprises a first monochromatic L ED test light source (15), a first light-transmitting hole (17) is formed in front of the first monochromatic L ED test light source (15), a first collimating lens (19) is formed in front of the first light-transmitting hole (17), and the first monochromatic L ED test light source (15) is arranged at the rear focal point of the first collimating lens (19) and is used for converting a light beam emitted by the first monochromatic L ED test light source (15) through the first light-transmitting hole (17) into a collimated light beam which is projected onto the first focusing assembly (4) after passing through the first collimating lens (19).

4. The device for detecting refractive index of lens according to claim 1, wherein the light splitting assembly (10) comprises a transflective first light splitting plate (21), the first focusing assembly (4) comprises a focusing lens (25), the center of the first light splitting plate (21), the center of the focusing lens (25), the center of the first collimating lens (19), the center of the first light transmitting hole (17) and the center of the first monochromatic L ED test light source (15) are all located in a first optical axis direction (A), the center of the second mirror (12), the center of the first light splitting plate (21) and the center of the first photodetecting assembly (8) are all located in a second optical axis direction (B) perpendicular to the first optical axis direction (A), when the second mirror (12) is located at the left side of the first light splitting plate (21), the side of the first light splitting plate (21) and the second optical axis direction (B) form an included angle of 45 °, when the first mirror (12) is located at the right side of the first light splitting plate (21), the second light splitting plate (21) and the second optical axis direction (135 ° is located at the right side of the first light splitting plate (21).

5. The device for detecting refractive index of lens according to claim 1, wherein: the imaging device is characterized in that the first imaging assembly (6) and the second imaging assembly (7) are both a camera (27) with an oblique imaging lens (26), and the included angle of the optical axis direction of the oblique imaging lens (26) relative to the first optical axis direction (A) and the included angle of the optical axis direction of the oblique imaging lens (26) relative to the imaging chip plane of the camera (27) meet the object image conjugate relation of oblique imaging of the imaging lens.

6. A device for detecting the refractive index of a lens is characterized in that: the detection device comprises a light source module, a lens center physical thickness detection module and a lens center optical thickness detection module, wherein the light source module comprises a first light source component (1) for outputting a collimated light beam, a first removable focusing component (4), the lens center physical thickness detection module comprises a first imaging component (6) and a second imaging component (7), the lens center optical thickness detection module comprises a first photoelectric detection component (8), a second photoelectric detection component (9), a light splitting component (10), a Hartmann plate (30) and a second movable reflecting mirror (12), the second photoelectric detection component (9), the Hartmann plate (30), the light splitting component (10), the first removable focusing component (4) and the first light source component (1) are sequentially arranged from front to back along a first optical axis direction (A), and a reflecting film (32) for partially reflecting the light of the first light source component (1) is coated on the upper surface of the Hartmann plate (30) The lower surface of the Hartmann plate (30) is provided with an array type light hole (31) for projecting a light spot array to the second photoelectric detection component (9), the movable second reflector (12) is arranged on one side of the light splitting component (10), the first photoelectric detection component (8) is arranged on the other side of the light splitting component (10), the focal plane of the first focusing component (4) is positioned between the light splitting component (10) and the Hartmann plate (30) and used for placing a measured lens (13), the first imaging component (6) and the second imaging component (7) are respectively arranged above and below the measured lens (13), and when the first focusing component (4) is removed, collimated light beams transmitted by the first light source component (1) along the first optical axis direction (A) are transmitted through the light splitting component (10) and then projected onto the measured lens (13) and the Hartmann plate (30) and enter the second photoelectric detection component (9), a second photoelectric detection component (9) is used for detecting a light spot array projected by a Hartmann plate (30), after the light spot array is inserted into a first focusing component (4), collimated light beams transmitted by the first light source component (1) along a first optical axis direction (A) are transmitted through a light splitting component (10) and focused at a measured lens (13) by the first focusing component (4), meanwhile, scattered light spots are generated on the upper surface and the lower surface of the measured lens (13) and are detected by a first imaging component (6) and a second imaging component (7), in addition, light beams transmitted by the first light source component (1) along the first optical axis direction (A) are further split into two beams by the light splitting component (10), one beam is projected onto a second reflecting mirror (12) and reflected by the second reflecting mirror (12) to return to the original path, the other beam is further transmitted into a first photoelectric detection component (8) by the light splitting component (10), projected onto the Hartmann plate (30) and reflected by the upper surface of the Hartmann plate (30) to return to the original path, and is also reflected into the first photoelectric detection assembly (8) through the light splitting assembly (10), and the two returned light beams enter the first photoelectric detection assembly (8) for detecting the interference phenomenon.

7. The device for detecting the refractive index of an ophthalmic lens according to claim 6, wherein the first light source assembly (1) comprises a first monochromatic L ED test light source (15), a first light-transmitting hole (17) is formed in front of the first monochromatic L ED test light source (15), a first collimating lens (19) is formed in front of the first light-transmitting hole (17), and the first monochromatic L ED test light source (15) is arranged at the rear focal point of the first collimating lens (19) and is used for converting a light beam emitted by the first monochromatic L ED test light source (15) through the first light-transmitting hole (17) into a collimated light beam which is projected onto the first focusing assembly (4) after passing through the first collimating lens (19).

8. The device for detecting the refractive index of an ophthalmic lens according to claim 6, wherein the light splitting assembly (10) comprises a transflective first light splitting plate (21), the first focusing assembly (4) comprises a focusing lens (25), the center of the first light splitting plate (21), the center of the focusing lens (25), the center of the first collimating lens (19), the center of the first light transmitting hole (17) and the center of the first monochromatic L ED test light source (15) are all located in a first optical axis direction (A), the center of the second mirror (12), the center of the first light splitting plate (21) and the center of the first photodetection assembly (8) are all located in a second optical axis direction (B) perpendicular to the first optical axis direction (A), when the second mirror (12) is located at the left side of the first light splitting plate (21), the side of the first light splitting plate (21) and the second optical axis direction (B) form an included angle of 45 degrees, and when the first mirror (12) is located at the right side of the first light splitting plate (21), the second light splitting plate (21) and the second optical axis direction (135 degrees are included angle degrees.

9. A device for detecting the refractive index of a lens is characterized in that: the device comprises a light source module, a lens center physical thickness detection module and a lens center optical thickness detection module, wherein the light source module comprises a first light source component (1) and a second light source component (2) for outputting collimated light beams, a first focusing component (4) and a first light combining component (14), the lens center physical thickness detection module comprises a first imaging component (6) and a second imaging component (7), the lens center optical thickness detection module comprises a first photoelectric detection component (8), a second photoelectric detection component (9), a light splitting component (10), a Hartmann plate (30) and a movable second reflector (12), the second photoelectric detection component (9), the Hartmann plate (30), the light splitting component (10), the first light combining component (14) and the second light source component (2) are sequentially arranged from front to back along a first optical axis direction (A), the first light source assembly (1) is arranged on one side of a first light combining assembly (14), the first focusing assembly (4) is arranged between the first light source assembly (1) and the first light combining assembly (14), a reflecting film (32) is coated on the upper surface of the Hartmann plate (30) and used for partially reflecting the light beam of the first light source assembly (1), an array type light hole (31) is formed in the lower surface of the Hartmann plate (30) and used for projecting a light spot array to a second photoelectric detection assembly (9), the movable second reflecting mirror (12) is arranged on one side of the light splitting assembly (10), the first photoelectric detection assembly (8) is arranged on the other side of the light splitting assembly (10), the focal plane of the first focusing assembly (4) is located between the light splitting assembly (10) and the Hartmann plate (30) and used for placing a measured lens (13), and the first imaging assembly (6) and the second imaging assembly (7) are respectively arranged above and below the measured lens (13) The light beam output by the first light source component (1) is reflected by the first light combining component (14), transmitted along the first optical axis direction (A), focused at the measured lens (13) by the first focusing component (4), and simultaneously scattered light spots are generated on the upper surface and the lower surface of the measured lens (13) and detected by the first imaging component (6) and the second imaging component (7), and simultaneously the light beam transmitted by the first light source component (1) along the first optical axis direction (A) is further divided into two beams by the light splitting component (10), one beam is projected onto the second mirror (12) and reflected by the second mirror (12) and returns in the original path, and further is transmitted into the first photoelectric detection component (8) by the light splitting component (10), the other beam is projected onto the Hartmann plate (30) and reflected by the upper surface of the Hartmann plate (30) and returns in the original path, and is also reflected into the first photoelectric detection component (8) by the light splitting component (10), the two returned light beams enter the first photoelectric detection assembly (8) for detecting an interference phenomenon, collimated light beams transmitted by the second light source assembly (2) along the first optical axis direction (A) are transmitted to the second photoelectric detection assembly (9) after being transmitted through the first light combining assembly (14), the light splitting assembly (10), the measured lens (13) and the Hartmann plate (30), and the second photoelectric detection assembly (9) detects a light spot array projected by the Hartmann plate (30).

10. The device for detecting the refractive index of an ophthalmic lens according to claim 9, wherein the first light source assembly (1) comprises a first monochromatic L ED test light source (15), a first light-transmitting hole (17) is formed in front of the first monochromatic L ED test light source (15), a first collimating lens (19) is formed in front of the first light-transmitting hole (17), and the first monochromatic L ED test light source (15) is disposed at the rear focal point of the first collimating lens (19) and is used for converting the light beam emitted by the first monochromatic L ED test light source (15) through the first light-transmitting hole (17) into a collimated light beam to be projected onto the first focusing assembly (4) after passing through the first collimating lens (19).

11. The device for inspecting refractive index of lens according to claim 10, wherein the second light source assembly (2) comprises a second monochromatic L ED test light source (16), a second light hole (18) is provided in front of the second monochromatic L ED test light source (16), a second collimating lens (20) is provided in front of the second light hole (18), and the second monochromatic L ED test light source (16) is provided at the back focal point of the second collimating lens (20) for converting the light beam emitted from the second monochromatic L ED test light source (16) through the second light hole (18) into a collimated light beam after passing through the second collimating lens (20).

12. The device for detecting refractive index of lens according to claim 9, wherein: the light splitting component (10) comprises a semitransparent first light splitting piece (21), the center of the second reflecting mirror (12), the center of the first light splitting piece (21) and the center of the first photoelectric detection component (8) are all located in a second optical axis direction (B) perpendicular to the first optical axis direction (A), when the second reflecting mirror (12) is located on the left side of the first light splitting piece (21), the included angle between the side face of the first light splitting piece (21) and the second optical axis direction (B) is 45 degrees, and when the second reflecting mirror (12) is located on the right side of the first light splitting piece (21), the included angle between the side face of the first light splitting piece (21) and the second optical axis direction (B) is 135 degrees.

13. The device for detecting refractive index of lens according to claim 11, wherein the first light combining component (14) comprises a transflective second dichroic sheet (22), the first focusing component (4) comprises a focusing lens (25), the center of the first monochromatic L ED test light source (15), the center of the first light transmitting hole (17), the center of the first collimating lens (19), the center of the focusing lens (25) and the center of the second dichroic sheet (22) are all located in a third optical axis direction (C) perpendicular to the first optical axis direction (A), the center of the second monochromatic L ED test light source (16), the center of the second light transmitting hole (18), the center of the second collimating lens (20) and the center of the second dichroic sheet (22) are all located in the first optical axis direction (A), when the first monochromatic L ED test light source (15) is located on the left side of the second dichroic sheet (22), the angle between the side of the second dichroic sheet (22) and the third optical axis direction (C) is L ° when the first monochromatic L ED test light source (15) is located on the right side of the second dichroic sheet (22).

14. A device for detecting the refractive index of a lens is characterized in that: the device comprises a light source module, a lens center physical thickness detection module and a lens center optical thickness detection module, wherein the light source module comprises a first light source component (1) and a second light source component (2) for outputting collimated light beams, a third light source component (3), a first light combining component (14), a second light combining component (29) and a first focusing component (4), the lens center physical thickness detection module comprises a first imaging component (6) and a second imaging component (7), the lens center optical thickness detection module comprises a first photoelectric detection component (8), a second photoelectric detection component (9), a light splitting component (10), a Hartmann plate (30) and a movable second reflector (12), and the second photoelectric detection component (9), the Hartmann plate (30), the light splitting component (10), the first focusing component (4), the first light combining component (14), The first light source assembly (1) is sequentially arranged from front to back along a first optical axis direction (A), the second reflector (12) is arranged on one side of the light splitting assembly (10), the first photoelectric detection assembly (8) is arranged on the other side of the light splitting assembly (10), the focal plane of the first focusing assembly (4) is positioned between the light splitting assembly (10) and the Hartmann plate (30) and used for placing a measured lens (13), the first imaging assembly (6) and the second imaging assembly (7) are respectively arranged above and below the measured lens (13), the upper surface of the Hartmann plate (30) is coated with a reflecting film (32) for partially reflecting the light beam of the second light source assembly (2), and the lower surface of the Hartmann plate (30) is provided with an array type light hole (31); collimated light beams output by the first light source assembly (1) are transmitted along a first optical axis direction (A) after being transmitted through the first light combining assembly (14), and are focused at the measured lens (13) by the first focusing assembly (4), and scattering light spots are generated on the upper surface and the lower surface of the measured lens (13) and are detected by the first imaging assembly (6) and the second imaging assembly (7); the third light source assembly (3) is located at a back focus of the first focusing assembly (4), light beams output by the third light source assembly (3) are reflected by the second light combining assembly (29) and the first light combining assembly (14) in sequence, then are focused into parallel light beams by the first focusing assembly (4) and are transmitted along the first optical axis direction (A), and after the parallel light beams transmitted by the third light source assembly (3) along the first optical axis direction (A) transmit the measured lens (13) and the Hartmann plate (30), the second photoelectric detection assembly detects a light spot array transmitted through the Hartmann plate (30); collimated light beams output by the second light source component (2) are transmitted through the second light combining component (29), reflected by the first light combining component (14) and transmitted along the first optical axis direction (A), and then are divided into two beams through the light splitting component (10), one beam is projected onto the second reflector (12), reflected by the second reflector (12) and returned in the original path, further transmitted into the first photoelectric detection component (8) through the light splitting component (10), the other beam is projected onto the Hartmann plate (30), reflected by the upper surface of the Hartmann plate (30) and returned in the original path, and also reflected into the first photoelectric detection component (8) through the light splitting component (10), and the two returned beams enter the first photoelectric detection component (8) and are used for detecting an interference phenomenon.

15. The device for detecting refractive index of ophthalmic lens according to claim 14, wherein: the light splitting component (10) comprises a semitransparent first light splitting piece (21), the center of the first photoelectric detection component (8), the center of the first light splitting piece (21) and the center of the second reflector (12) are all located in a second optical axis direction (B) perpendicular to the first optical axis direction (A), when the second reflector (12) is located on the right side of the first light splitting piece (21), the included angle between the side face of the first light splitting piece (21) and the second optical axis direction (B) is 135 degrees, when the second reflector (12) is located on the left side of the first light splitting piece (21), the included angle between the side face of the first light splitting piece (21) and the second optical axis direction (B) is 45 degrees.

16. The device for detecting refractive index of ophthalmic lens according to claim 14, wherein: the first light combination component (14) comprises a semi-transparent and semi-reflective second light splitter (22), the second light source component (2) and the third light source component (3) are arranged on the same side of the second light splitter (22), and the second light combination component (29) comprises a semi-transparent and semi-reflective third light splitter (23) arranged between the second light splitter (22) and the second light source component (2); the first light source component (1) is arranged behind the second light splitting sheet (22), and collimated light beams output by the first light source component are projected onto the second light splitting sheet (22) along the first optical axis direction (A) and then transmitted; collimated light beams output by the second light source component (2) are transmitted along a third optical axis direction (C) perpendicular to the first optical axis direction (A), then are projected onto a third light splitter (23), are transmitted, are reflected by a second light splitter (22) and are transmitted along the first optical axis direction (A); the light beam output by the third light source component (3) is transmitted along a fourth optical axis direction (D) which is vertical to the third optical axis direction (C), and then is transmitted along the first optical axis direction (A) after being reflected by a third light splitter (23) and a second light splitter (22) in sequence; when the second light splitter (22) and the third light splitter (23) are both at an angle of 45 degrees with respect to the third optical axis direction (C), the second light source assembly (2) is positioned on the right side of the second light splitter (22) and the third light source assembly (3) is positioned above the third optical axis direction (C), when the second light splitter (22) and the third light splitter (23) are both at an angle of 135 degrees with respect to the second optical axis direction (B), the second light source assembly (2) is positioned on the left side of the second light splitter (22) and the third light source assembly (3) is positioned above the third optical axis direction (C), when the second light splitter (22) is at an angle of 45 degrees with respect to the third optical axis direction (C) and the third light splitter (23) is at an angle of 135 degrees with respect to the third optical axis direction (C), the second light source assembly (2) is positioned on the right side of the second light splitter (22) and the third light source assembly (3) is positioned below the third optical axis direction (C), when the second light splitter (22) and the third optical axis direction (C) are 135 degrees and the third light splitter (23) and the third optical axis direction (C) are 45 degrees, the second light source assembly (2) is located on the left side of the second light splitter (22) and the third light source assembly (3) is located below the third optical axis direction (C).

17. The device for detecting refractive index of ophthalmic lens according to claim 14, wherein: the first light source component (1) comprises a semiconductor laser, the semiconductor laser is arranged behind the second light splitting sheet (22), and collimated light beams output by the semiconductor laser are transmitted after being projected onto the second light splitting sheet (22) along the first optical axis direction (A).

18. The device for inspecting refractive index of lens according to claim 14, wherein the second light source assembly (2) comprises a first monochromatic L ED test light source (15), a first light hole (17) is disposed in front of the first monochromatic L ED test light source (15), a first collimating lens (19) is disposed in front of the first light hole (17), the first monochromatic L ED test light source (15) is disposed at the back focal point of the first collimating lens (19) for converting the light beam emitted from the first monochromatic L ED test light source (15) through the first light hole (17) into a collimated light beam via the first collimating lens (19), the collimated light beam output from the first monochromatic L ED test light source (15) is transmitted through the third light splitter (23) along a third optical axis direction (C) perpendicular to the first optical axis direction (A) and reflected by the second light splitter (22) and transmitted along the first optical axis direction (A), and the center of the third light splitter (23) and the center of the first light source (22) are located at the center of the first light axis (19), the second light source (22), the center of the third light hole (23) and the center of the first light source (19) and the second light source (L).

19. The device for detecting the refractive index of lens according to claim 14, wherein the third light source assembly (3) comprises a second monochromatic L ED test light source (16), a second light-transmitting hole (18) is disposed in front of the second monochromatic L ED test light source (16), the second monochromatic L ED test light source (16) is disposed at the back focus of the first focusing assembly (4) for projecting the light beam emitted from the second monochromatic L ED test light source (16) through the second light-transmitting hole (18) to the third light-dividing sheet (23) through the first focusing assembly (4) to become a collimated light beam, the collimated light beam output from the second monochromatic L ED test light source (16) is transmitted along the first optical axis (A) after being reflected twice by the third light-dividing sheet (23) and the second light-dividing sheet (22), and the center of the third light-dividing sheet (23), the center of the second light-transmitting hole (18) and the center of the second light-transmitting sheet (L) are all perpendicular to the optical axis (C) of the third light-transmitting sheet (23).