CN209764383U - Convex lens focal length measuring device - Google Patents
Convex lens focal length measuring device Download PDFInfo
- Publication number
- CN209764383U CN209764383U CN201920770193.7U CN201920770193U CN209764383U CN 209764383 U CN209764383 U CN 209764383U CN 201920770193 U CN201920770193 U CN 201920770193U CN 209764383 U CN209764383 U CN 209764383U
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- convex lens
- slide block
- tested
- slide
- fixed base
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Abstract
The utility model discloses a convex lens focal length measuring device, which comprises a fixed base, wherein two fixed slide rails are oppositely arranged on the fixed base, at least three slide rail seats are slidably arranged on the two fixed slide rails, and a light source device, a known convex lens device and an imaging measurement display device are sequentially and correspondingly arranged on the three slide rail seats; the fixed base is also provided with a slide block guide rail parallel to the fixed slide rail, the slide block guide rail is provided with a slide block to be tested positioned between the known convex lens device and the imaging measurement display device in a sliding manner, the slide block to be tested is correspondingly provided with a convex lens device to be tested, and a slide block driving device is arranged between the fixed base and the slide block to be tested; the fixed base is also provided with an interval measuring device parallel to the fixed slide rail; the utility model discloses simple structure, reasonable in design, it is with low costs, convenient operation, measuring error is little, and the measuring focal length result is accurate, is favorable to improving teaching quality and student's enthusiasm.
Description
Technical Field
The utility model relates to an optics demonstration teaching experiment device especially relates to a convex lens focus measuring device.
Background
A convex lens is a commonly used optical element and is widely used in optical systems, and the focal length is one of the most important parameters of the lens. The most common method for teaching at present is a parallel light focusing method, wherein parallel light is irradiated on one side of a convex lens, the convex lens is moved back and forth, so that the parallel light passes through the convex lens and forms a minimum and brightest light spot on a light screen or white paper on the other side, and then a graduated scale is used for measuring the distance from the light spot to the convex lens, namely the focal length of the convex lens.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a simple structure, reasonable in design, with low costs, convenient operation, little convex lens focus measuring device of measuring error are provided, and the measuring focus result is accurate, is favorable to improving teaching quality and student's enthusiasm.
In order to solve the technical problem, the technical scheme of the utility model is that: the convex lens focal length measuring device comprises a fixed base, wherein two fixed slide rails are oppositely arranged on the fixed base, at least three slide rail seats are slidably arranged on the two fixed slide rails, and a light source device, a known convex lens device and an imaging measurement display device are sequentially and correspondingly arranged on the three slide rail seats; the fixed base is also provided with a slide block guide rail parallel to the fixed slide rail, a slide block to be tested positioned between the known convex lens device and the imaging measurement display device is installed on the slide block guide rail in a sliding mode, the slide block to be tested is correspondingly installed with a convex lens device to be tested, and a slide block driving device for driving the slide block to be tested to move along the slide block guide rail is arranged between the fixed base and the slide block to be tested; and the fixed base is also provided with an interval measuring device parallel to the fixed slide rail.
as a preferred technical scheme, the slider driving device comprises a threaded rod which is parallel to the slider guide rail and is positioned below the slider seat, two ends of the threaded rod are relatively rotatably provided with a screw installation seat, the screw installation seat is fixedly arranged on the fixed base, and the slider to be tested is in threaded connection with the threaded rod; one end of the threaded rod is connected with a driving motor through a coupler.
as a preferable technical scheme, the light source device comprises a laser bracket detachably mounted on the slide rail seat, and a laser is mounted at the top end of the laser bracket.
As a preferred technical solution, the known convex lens device comprises a known convex lens bracket detachably mounted on the slide rail seat, and a known convex lens is mounted at the top end of the known convex lens bracket, and the known convex lens corresponds to the height of the laser.
As the preferred technical scheme, the convex lens device to be tested comprises a convex lens support to be tested which is detachably mounted on the slide block to be tested, the convex lens to be tested is mounted at the top end of the convex lens support to be tested, and the convex lens to be tested corresponds to the height of the known convex lens.
As a preferred technical scheme, the imaging measurement display device comprises an imaging support which is detachably mounted on the slide rail seat, an imaging plate is mounted at the top end of the imaging support, a photosensitive sensor for measuring light spots is arranged on the imaging plate, and the photosensitive sensor is arranged corresponding to the center of the convex lens to be measured; the imaging measurement display device also comprises a data display electrically connected with the photosensitive sensor.
As a preferable technical solution, the distance measuring device is a graduated scale installed on the fixed base for measuring the distance.
As a preferable technical scheme, a power supply control system is further arranged on the fixed base, and the light source device, the imaging measurement display device and the slider driving device are all electrically connected to the power supply control system.
by adopting the technical scheme, the convex lens focal length measuring device comprises a fixed base, wherein two fixed slide rails are oppositely arranged on the fixed base, at least three slide rail seats are slidably arranged on the two fixed slide rails, and a light source device, a known convex lens device and an imaging measurement display device are sequentially and correspondingly arranged on the three slide rail seats; the fixed base is also provided with a slide block guide rail parallel to the fixed slide rail, a slide block to be tested positioned between the known convex lens device and the imaging measurement display device is installed on the slide block guide rail in a sliding mode, the slide block to be tested is correspondingly installed with a convex lens device to be tested, and a slide block driving device for driving the slide block to be tested to move along the slide block guide rail is arranged between the fixed base and the slide block to be tested; the fixed base is also provided with an interval measuring device parallel to the fixed slide rail; the utility model has the advantages that: when the device is installed, firstly, the centers of the light source device, the known convex lens device, the imaging measurement display device and the convex lens device to be measured form a horizontal straight line; then, carrying out position determination, moving each slide rail seat along the fixed slide rail to adjust the distance between the light source device and a known convex lens device, when the positions of the light source device and the known convex lens device are determined, then adjusting the position of the imaging measurement display device to keep a certain distance between the imaging measurement display device and the known convex lens device, and fixing the positions of the three slide rail seats after the adjustment is finished, wherein the distance between the light source device and the known convex lens device is equal to the focal length of the known convex lens device when the adjustment is carried out, so that the light coming out of the light source device can form parallel light after passing through the known convex lens device; during measurement, parallel light from the known convex lens device is still parallel light after passing through the convex lens device to be measured, and light from the convex lens device to be measured can be converged, so as to ensure clear imaging, the slider to be measured is driven by the slider driving device to move along the slider guide rail until clear, minimum and brightest light spots are measured on the imaging measurement display device, the slider to be measured is kept fixed, and then the distance between the imaging measurement display device and the convex lens device to be measured is measured by the distance measuring device, namely the focal length of the convex lens device to be measured; the utility model discloses simple structure, reasonable in design, it is with low costs, convenient operation, measuring error is little, and the measuring focal length result is accurate, is favorable to improving teaching quality and student's enthusiasm.
drawings
The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
Fig. 2 is a schematic structural diagram of an embodiment of the present invention;
Fig. 3 is a top view of an embodiment of the invention;
FIG. 4 is an enlarged schematic view at A in FIG. 2;
In the figure: 1-fixing a base; 2-fixing the slide rail; 3-a slide rail seat; 4-a slider guide rail; 5-a slide block to be tested; 6-a threaded rod; 7-screw mounting seat; 8-driving a motor; 9-laser support; 10-a laser; 11-known convex lens holder; 12-known convex lens; 13-a convex lens support to be measured; 14-a convex lens to be measured; 15-an imaging support; 16-an imaging plate; 17-a light sensitive sensor; 18-a data display; 19-graduated scale.
Detailed Description
The invention is further explained below with reference to the drawings and examples. In the following detailed description, certain exemplary embodiments of the present invention have been described by way of illustration only. Needless to say, a person skilled in the art will recognize that the described embodiments can be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.
As shown in fig. 1 to 4, the convex lens focal length measuring device includes a fixed base 1, two fixed slide rails 2 are oppositely disposed on the fixed base 1, at least three slide rail seats 3 are slidably mounted on the two fixed slide rails 2, and a light source device, a known convex lens device and an imaging measurement display device are sequentially and correspondingly mounted on the three slide rail seats 3; the fixed base 1 is further provided with a slide block guide rail 4 parallel to the fixed slide rail 2, a slide block 5 to be tested positioned between the known convex lens device and the imaging measurement display device is slidably mounted on the slide block guide rail 4, the slide block 5 to be tested is correspondingly mounted with a convex lens device to be tested, and a slide block driving device for driving the slide block 5 to be tested to move along the slide block guide rail 4 is arranged between the fixed base 1 and the slide block 5 to be tested; and the fixed base 1 is also provided with an interval measuring device parallel to the fixed slide rail 2. When the device is installed, firstly, the centers of the light source device, the known convex lens device, the imaging measurement display device and the convex lens device to be measured form a horizontal straight line; then, position determination is carried out, the distance between the light source device and a known convex lens device is adjusted by sliding each slide rail seat 3 to move along the fixed slide rail 2, after the position of the light source device and the known convex lens device is determined, the position of the imaging measurement display device is adjusted, a certain distance is kept between the imaging measurement display device and the known convex lens device, and after the position determination is completed, the positions of the three slide rail seats 3 are fixed, wherein the distance between the light source device and the known convex lens device is equal to the focal length of the known convex lens device when the position determination is carried out, so that parallel light can be formed after light coming out of the light source device passes through the known convex lens device; during the measurement, follow the parallel light that known convex lens device came out passes through still be the parallel light behind the convex lens device that awaits measuring, and follow the light that the convex lens device that awaits measuring came out can take place to assemble, in order to guarantee that the formation of image is clear, consequently passes through slider drive arrangement drive slider 5 that awaits measuring along slider guide rail 4 removes, until it is in after measuring clear, minimum, the brightest facula on the formation of image measurement display device, keeps slider 5 that awaits measuring is fixed motionless, then adopts interval measuring device measures formation of image measurement display device with the distance between the convex lens device that awaits measuring, promptly the focus of the convex lens device that awaits measuring. The utility model discloses simple structure, reasonable in design, it is with low costs, convenient operation, measuring error is little, and the measuring focal length result is accurate, is favorable to improving teaching quality and student's enthusiasm.
The slide block driving device comprises a threaded rod 6 which is parallel to the slide block guide rail 4 and is positioned below the slide rail seat 3, two ends of the threaded rod 6 are relatively rotatably provided with a screw installation seat 7, the screw installation seat 7 is fixedly arranged on the fixed base 1, and the slide block 5 to be tested is in threaded connection with the threaded rod 6; and one end of the threaded rod 6 is connected with a driving motor 8 through a coupler. The driving motor 8 is a stepping motor, during measurement, the driving motor 8 rotates to drive the threaded rod 6 to rotate, and during rotation, the slide block 5 to be measured moves along the slide block guide rail 4 to drive the convex lens device to be measured mounted on the slide block 5 to be measured to reciprocate, so that the state of light spots is adjusted; the driving motor 8 is electrically controlled, and compared with the manual adjustment mode in the prior art, the moving speed is constant, so that the change process of the light spot is more stable, the light spot can be regularly found, the operation is simpler and more convenient, the moving distance can be finely adjusted, the experiment measurement can be effectively and accurately completed by one person, and the teaching quality and the student enthusiasm are favorably improved.
The light source device comprises a laser support 9 which is detachably mounted on the slide rail seat 3, and a laser 10 is mounted at the top end of the laser support 9. The laser 10 serves as a light source for generating laser light.
The known convex lens device comprises a known convex lens support 11 which is detachably mounted on the slide rail seat 3, a known convex lens 12 is mounted at the top end of the known convex lens support 11, the focal length of the known convex lens 12 is known, and the known convex lens 12 corresponds to the height of the laser 10 and is used for ensuring that the center of the known convex lens 12 and the center of the laser 10 are on the same horizontal line.
The convex lens device that awaits measuring is including demountable installation the convex lens support 13 that awaits measuring on the slider 5 that awaits measuring, the convex lens 14 that awaits measuring is installed on the top of the convex lens support 13 that awaits measuring, the convex lens 14 that awaits measuring with the height of known convex lens 12 corresponds, is used for guaranteeing the laser instrument 10 known convex lens 12 the center of the convex lens 14 that awaits measuring all is on a water flat line.
The imaging measurement display device comprises an imaging support 15 which is detachably mounted on the slide rail seat 3, an imaging plate 16 is mounted at the top end of the imaging support 15, a photosensitive sensor 17 for measuring light spots is arranged on the imaging plate 16, and the photosensitive sensor 17 is arranged corresponding to the center of the convex lens 14 to be measured; the imaging measurement display device further comprises a data display 18 electrically connected to the light-sensitive sensor 17. Photosensitive sensor 17 with data display 18 is prior art, belongs to the known technique of the ordinary engineering technical staff in this field, no longer gives unnecessary details here, photosensitive sensor 17 is used for showing facula on the formation of image board 16 is measured, photosensitive sensor 17 will measure the data transfer extremely on the data display 18, wherein carry out data conversion through the PLC chip to show numerical value data display 18 is last, the measurement personnel basis data display 18 is last shows quantity, can more audio-visual judgement which facula be most clear, minimum, brightest, compare with the method through the naked eye observation among the prior art, the utility model discloses in adopt visual data display, measuring error is little, and the measuring focal length result is more accurate.
The distance measuring device is a graduated scale 19 which is arranged on the fixed base 1 and used for measuring the distance between each component, no additional ruler is needed for measuring, and the length of the graduated scale 19 is from one end of the fixed base 1 to the other end, so that the measuring requirement is guaranteed.
still be provided with power control system on unable adjustment base 1, light source device the formation of image is measured display device the equal electricity of slider drive arrangement is connected to power control system, power control system does the utility model provides a power support.
The utility model discloses a theory of operation does:
During installation, the center of the laser 10, the center of the known convex lens 12, the center of the convex lens 14 to be measured and the photosensitive sensor 17 on the imaging plate 16 are ensured to be on the same horizontal line, then position determination is carried out, the distance between the laser 10 and the known convex lens 12 is adjusted by sliding each slide rail seat 3 to move along the fixed slide rail 2, after the positions of the laser 10 and the known convex lens 12 are determined, the position of the imaging plate 16 is adjusted, so that a certain distance is kept between the imaging plate 16 and the known convex lens 12, and the positions of the three slide rail seats 3 are fixed after the adjustment is finished;
Wherein, because the focal length of the known convex lens device is known, when adjusting, the distance between the laser 10 and the known convex lens 12 is equal to the focal length of the known convex lens 12, so that the light coming out from the laser 10 can form parallel light after passing through the known convex lens 12; during measurement, parallel light from the known convex lens 12 is still parallel light after passing through the convex lens 14 to be measured, and light from the convex lens 14 to be measured is converged, so as to ensure clear imaging, the slider driving device drives the slider 5 to be measured to move along the slider guide rail 4 until clear, minimum and brightest light spots are measured on the photosensitive sensor 17 on the imaging plate 16, in the sliding process of the slider 5 to be measured, the photosensitive sensor 17 converts light signals into data signals through a PLC chip to be displayed on the data display 18, at this time, a measurer can intuitively and accurately judge the clearest, minimum and brightest light spots through the data display 18, at this time, the measurer does not move the slider 5 to be measured, and finally measures the scale value corresponding to the convex lens 14 to be measured to be X1 and the scale value corresponding to the imaging plate 16 to be X2 through the scale 19, therefore, the focal length value f of the convex lens 14 to be measured is | X2-X1|, and the focal length measurement is completed.
Owing to install slide rail seat 3 with the slider 5 upper mounting that awaits measuring is demountable installation, consequently, also can will install slide rail seat 3 with light source device, known convex lens device, formation of image measurement display device on the slider 5 that awaits measuring, the device on the convex lens device that awaits measuring are dismantled and are replaced into other devices, for example are used for measuring each part of concave lens focus, make the utility model discloses extensive commonality has.
The basic principles, main features and advantages of the present invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. Convex lens focus measuring device, including unable adjustment base, its characterized in that: two fixed slide rails are oppositely arranged on the fixed base, at least three slide rail seats are slidably arranged on the two fixed slide rails, and a light source device, a known convex lens device and an imaging measurement display device are sequentially and correspondingly arranged on the three slide rail seats; the fixed base is also provided with a slide block guide rail parallel to the fixed slide rail, a slide block to be tested positioned between the known convex lens device and the imaging measurement display device is installed on the slide block guide rail in a sliding mode, the slide block to be tested is correspondingly installed with a convex lens device to be tested, and a slide block driving device for driving the slide block to be tested to move along the slide block guide rail is arranged between the fixed base and the slide block to be tested; and the fixed base is also provided with an interval measuring device parallel to the fixed slide rail.
2. The convex lens focal length measuring device according to claim 1, wherein: the slide block driving device comprises a threaded rod which is parallel to the slide block guide rail and is positioned below the slide rail seat, two ends of the threaded rod are relatively rotatably provided with a screw rod installation seat, the screw rod installation seat is fixedly arranged on the fixed base, and the slide block to be detected is in threaded connection with the threaded rod; one end of the threaded rod is connected with a driving motor through a coupler.
3. The convex lens focal length measuring device according to claim 1, wherein: the light source device comprises a laser support which is detachably mounted on the slide rail seat, and a laser is mounted at the top end of the laser support.
4. The convex lens focal length measuring device according to claim 3, wherein: the known convex lens device comprises a known convex lens support which is detachably mounted on the slide rail seat, a known convex lens is mounted at the top end of the known convex lens support, and the known convex lens corresponds to the height of the laser.
5. The convex lens focal length measuring device according to claim 4, wherein: the convex lens device to be tested comprises a convex lens support to be tested which is detachably mounted on the sliding block to be tested, the convex lens to be tested is mounted at the top end of the convex lens support to be tested, and the convex lens to be tested corresponds to the height of the known convex lens.
6. The convex lens focal length measuring device according to claim 5, wherein: the imaging measurement display device comprises an imaging support which is detachably mounted on the slide rail seat, an imaging plate is mounted at the top end of the imaging support, a photosensitive sensor for measuring light spots is arranged on the imaging plate, and the photosensitive sensor is arranged corresponding to the center of the convex lens to be measured; the imaging measurement display device also comprises a data display electrically connected with the photosensitive sensor.
7. the convex lens focal length measuring device according to claim 1, wherein: the interval measuring device is a graduated scale which is arranged on the fixed base and used for measuring intervals.
8. The convex lens focal length measuring device according to any one of claims 1 to 7, wherein: the fixed base is also provided with a power supply control system, and the light source device, the imaging measurement display device and the sliding block driving device are all electrically connected to the power supply control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920770193.7U CN209764383U (en) | 2019-05-27 | 2019-05-27 | Convex lens focal length measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920770193.7U CN209764383U (en) | 2019-05-27 | 2019-05-27 | Convex lens focal length measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209764383U true CN209764383U (en) | 2019-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920770193.7U Expired - Fee Related CN209764383U (en) | 2019-05-27 | 2019-05-27 | Convex lens focal length measuring device |
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| Country | Link |
|---|---|
| CN (1) | CN209764383U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114061910A (en) * | 2021-11-12 | 2022-02-18 | 西安交通大学 | Device and method for measuring focal length of convex-concave lens |
-
2019
- 2019-05-27 CN CN201920770193.7U patent/CN209764383U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114061910A (en) * | 2021-11-12 | 2022-02-18 | 西安交通大学 | Device and method for measuring focal length of convex-concave lens |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191210 Termination date: 20200527 |
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| CF01 | Termination of patent right due to non-payment of annual fee |