CN112180551A - Optical beam splitting device for receiving three bands through common window and application thereof - Google Patents
Optical beam splitting device for receiving three bands through common window and application thereof Download PDFInfo
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- CN112180551A CN112180551A CN202011097127.1A CN202011097127A CN112180551A CN 112180551 A CN112180551 A CN 112180551A CN 202011097127 A CN202011097127 A CN 202011097127A CN 112180551 A CN112180551 A CN 112180551A
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- light
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- prism
- splitting device
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- 230000003287 optical effect Effects 0.000 title claims abstract description 22
- 239000002131 composite material Substances 0.000 claims abstract description 23
- 238000003384 imaging method Methods 0.000 claims abstract description 10
- 238000005259 measurement Methods 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
- G02B13/0065—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element having a beam-folding prism or mirror
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C3/00—Measuring distances in line of sight; Optical rangefinders
- G01C3/02—Details
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
- G02B13/006—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element at least one element being a compound optical element, e.g. cemented elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/008—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras designed for infrared light
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/14—Optical objectives specially designed for the purposes specified below for use with infrared or ultraviolet radiation
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Measurement Of Optical Distance (AREA)
- Optical Radar Systems And Details Thereof (AREA)
Abstract
The invention relates to an optical light splitting device for receiving three wave bands through a common window and application of the optical light splitting device in distance measurement camera white light observation equipment and distance measurement double-path camera equipment such as handholds, vehicles and aircrafts. The device comprises a shared lens group, a composite prism, a beam splitter prism, an avalanche diode detector, a near infrared detector and a visible light detector. External light passes through the common lens group and is refracted by the composite prism into two paths of light, wherein one path of light enters the avalanche diode detector, the other path of light enters the beam splitter prism and is refracted into two paths of light again, and the two paths of light respectively enter the near infrared detector and the visible light detector for imaging. The device has simple structure, small volume and light weight, simultaneously realizes three functions of distance measurement, visible light imaging and near infrared light imaging, and has wider application range and stronger adaptability.
Description
Technical Field
The invention relates to the technical field of optics, in particular to an optical splitting device for receiving three wave bands through a common window and application thereof.
Background
With the progress of technology, the requirements of multifunctional camera products on functions and integration level are higher and higher, and multifunctional integrated miniaturized equipment plays an increasingly important role in practical application. Traditional camera products and range finding products often have great difference in structure and function, and both possess the lens structure and the optical path system of complete difference and are not mutually general, and this has caused great obstacle to the photoelectric product of developing the utensil and having range finding, making a video recording dual function. A simple solution is to directly assemble the traditional camera product and the distance measurement product on the same shell, the two products are independent and do not interfere with each other, and respectively play corresponding functions, but the products are often large in size and weight and do not accord with the development trend of portability and light weight.
In addition, the existing distance measurement camera shooting product only has a single-path camera shooting function and can be only used in an environment with good lighting conditions, and the application range of the distance measurement camera shooting product is greatly limited.
Disclosure of Invention
The present invention is directed to overcoming the above problems in the prior art, and provides an optical splitting device for receiving three wavelength bands through a common window, the device including a common lens group, a composite prism 3, a splitting prism 5, a detector a, a detector b, and a detector c; the composite prism is positioned between the common lens group and the beam splitting prism, and the three are coaxial; external light rays penetrate through the shared lens group and then are refracted by the composite prism 3 into two paths of light rays, wherein one path of light rays enters the detector a, the other path of light rays enters the light splitting prism 5 and is refracted into two paths of light rays again, and the two paths of light rays respectively enter the detector b and the detector c.
Further, the common lens group comprises an objective lens cemented lens 1 and an objective lens third lens 2, wherein the objective lens cemented lens 1 is formed by bonding a double-convex lens and a double-concave lens; the third lens 2 of the objective lens is specifically a biconvex lens, and the cambered surface of the third lens is tightly attached to the biconcave lens in the objective lens cemented lens 1.
Further, composite prism 3 includes two right angle prisms and a right trapezoid prism, and wherein two relative right angle prisms of placing bond along the hypotenuse together, and right angle edge and preceding right angle prism's right angle edge of right trapezoid prism bond together, have plated at least one deck 45 at composite prism 3 inclined planes and have divided the light membrane.
Furthermore, the beam splitter prism 5 comprises two right-angle prisms, the two right-angle prisms are bonded together along the bevel edge, and at least one 45-degree beam splitting film is plated on the inclined surface of the beam splitter prism 5.
Furthermore, a receiving negative lens 8 and a narrow-band interference filter 9 are arranged between one of the light-emitting surfaces of the composite prism 3 and the detector a, and a focusing lens 4 is arranged between the other light-emitting surface of the composite prism 3 and the beam splitter prism 5. The focusing lens 4 is combined with the objective lens cemented lens 1 and the objective lens third lens 2 to form an imaging system, and the receiving negative lens 8 is combined with the objective lens cemented lens 1 and the objective lens third lens 2 to form a ranging receiving system.
Furthermore, a near-infrared filter 6 and a visible light filter 7 are respectively arranged on two light-emitting surfaces of the beam splitter prism 5.
Furthermore, the composite prism 3 refracts the incident light into two paths of light rays with the wavelength of 1.06-1.57 mu m and 0.425-1 mu m, the light rays with the wavelength of 1.06-1.57 mu m enter the detector a after being reflected, the light rays with the wavelength of 0.425-1 mu m enter the light splitting prism 5 after being transmitted, and then are refracted into two paths of light rays with the wavelength of 0.425-0.65 mu m and 0.72-1 mu m, and the two paths of light rays respectively enter the detector b and the detector c.
Further, the detector a is specifically a avalanche diode detector 10, the detector b is specifically a near infrared detector 11, and the detector c is specifically a visible light detector 12.
The invention also aims to use the optical light splitting device in handheld, vehicle-mounted and airborne distance measurement camera white light observation equipment, distance measurement double-path camera shooting equipment and the like.
Compared with the prior art, the invention has the following beneficial effects: (1) the incident light is divided into three paths by matching one lens group with two prisms, so that three functions of ranging, visible light imaging and near infrared light imaging are realized respectively; (2) the whole set of equipment has simple structure, small volume and light weight, can be held by hands or fixed on vehicles and aircrafts for use, and has stronger adaptability to external environment.
Drawings
FIG. 1 is a schematic structural diagram of an optical splitting device according to the present application;
fig. 2 is a schematic diagram of an optical path.
The system comprises an objective lens, a lens gluing lens, an objective lens, a third lens, a 3-composite prism, a 4-focusing lens, a 5-beam splitter prism, a 6-near infrared filter, a 7-visible light filter, an 8-receiving negative lens, a 9-narrow band interference filter, a 10-avalanche diode detector, a 11-near infrared detector and a 12-visible light detector.
Detailed Description
In order to make those skilled in the art fully understand the technical solutions and advantages of the present invention, the following description is further provided with reference to the specific embodiments and the accompanying drawings.
The optical splitting device for receiving three bands through a common window as shown in fig. 1-2 mainly comprises an objective cemented lens 1, an objective third lens 2, a compound prism 3, a focusing lens 4 and a splitting prism 5 which are coaxially arranged in sequence. The objective lens cemented lens 1 is formed by bonding a biconvex lens and a biconcave lens; the third lens 2 of the objective lens is a biconvex lens, and the front convex surface of the third lens is tightly attached to a biconcave lens. The composite prism 3 comprises two right-angle prisms with the same size and a right-angle trapezoidal prism, and the two right-angle prisms are bonded together in a mode shown in the figure; the beam splitter prism 5 is formed by bonding two right-angle prisms with the same size along an inclined plane; the inclined planes of the composite prism 3 and the beam splitter prism 5 are both plated with 45-degree beam splitter films. A receiving negative lens 8, a narrow-band interference lens 9 and an avalanche diode detector 10 are sequentially arranged on a light-emitting surface below the composite prism 3, and a near-infrared filter 6, a near-infrared detector 11, a visible light filter 7 and a visible light detector 12 are respectively arranged on two light-emitting surfaces which are perpendicular to each other of the beam splitter prism 5.
The principle of the optical splitting device is as follows: external light rays pass through the shared lens group (a lens consisting of the lenses 1 and 2) and then enter the composite prism, the light rays are divided into two beams of light with the wavelength of 1.06-1.57 mu m and 0.425-1 mu m, and the two beams of light pass through the receiving negative lens 8 and the narrow-band interference lens 9 and then enter the avalanche tube detector, so that the distance measurement function is realized. The latter is focused by a focusing lens 4 and then is divided into two beams of light with the wavelengths of 0.425-0.65 μm and 0.72-1 μm by a beam splitter 5, the light with the wavelength of 0.425-0.65 μm is polymerized to an imaging surface of a visible light detector 12 through a visible light filter 7, the light with the wavelength of 0.72-1 μm is polymerized to an imaging surface of a near infrared detector 11 through a near infrared filter 6, and double imaging of visible light and infrared is realized at the same time.
Claims (10)
1. An optical splitting apparatus for receiving three wavelength bands through a common window, comprising: the device comprises a shared lens group, a composite prism, a beam splitting prism, a detector a, a detector b and a detector c; the composite prism is positioned between the common lens group and the beam splitting prism, and the three are coaxial; the external light passes through the shared lens group and is refracted by the composite prism into two paths of light, wherein one path of light enters the detector a, the other path of light enters the beam splitting prism and is refracted into two paths of light again, and the two paths of light respectively enter the detector b and the detector c.
2. The optical splitting device of claim 1, wherein: the common lens group comprises an objective lens cemented lens and an objective lens third lens, wherein the objective lens cemented lens is formed by bonding a double-convex lens and a double-concave lens; the third lens of the objective lens is a biconvex lens, and the cambered surface of the third lens of the objective lens is clung to a biconcave lens in the objective lens cemented lens.
3. The optical splitting device of claim 1, wherein: the composite prism comprises two right-angle prisms and a right-angle trapezoidal prism, wherein the two oppositely-arranged right-angle prisms are bonded together along the bevel edge, the right-angle edge of the right-angle trapezoidal prism is bonded together with the right-angle edge of the front right-angle prism, and the inclined plane of the composite prism is plated with a 45-degree light splitting film.
4. The optical splitting device of claim 1, wherein: the beam splitting prism comprises two right-angle prisms which are bonded together along the bevel edge, and the inclined surface of the beam splitting prism is plated with a 45-degree beam splitting film.
5. The optical splitting device of claim 3, wherein: and a receiving negative lens and a narrow-band interference filter lens are arranged between the light-emitting surface of the right trapezoid prism of the composite prism and the detector a, and the receiving negative lens and the common lens group form a ranging receiving system.
6. The optical splitting device of claim 3, wherein: a focusing lens is arranged between the light-emitting surface of the right-angle prism of the composite prism and the beam splitter prism, and the focusing lens and the shared lens group form an imaging system.
7. The optical splitting device of claim 1, wherein: the light-emitting surfaces of the two right-angle prisms of the beam splitter prism are respectively provided with a near-infrared filter and a visible light filter.
8. The optical splitting device of claim 1, wherein: the detector a is specifically an avalanche diode detector, the detector b is specifically a near infrared detector, and the detector c is specifically a visible light detector.
9. The optical splitting device of claim 1, wherein: the composite prism refracts incident light into two paths of light with the wavelength of 1.06-1.57 mu m and 0.425-1 mu m, wherein the light with the wavelength of 1.06-1.57 mu m enters the detector a, and the light with the wavelength of 0.425-1 mu m enters the light splitting prism and is refracted into two paths of light with the wavelength of 0.425-0.65 mu m and 0.72-1 mu m, which respectively enter the detector b and the detector c.
10. Use of the optical splitting device of any one of claims 1 to 9 in hand-held, vehicle-mounted, or airborne distance-measuring camera white-light observation equipment, or distance-measuring two-way camera equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011097127.1A CN112180551A (en) | 2020-10-14 | 2020-10-14 | Optical beam splitting device for receiving three bands through common window and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011097127.1A CN112180551A (en) | 2020-10-14 | 2020-10-14 | Optical beam splitting device for receiving three bands through common window and application thereof |
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| Publication Number | Publication Date |
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| CN112180551A true CN112180551A (en) | 2021-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011097127.1A Pending CN112180551A (en) | 2020-10-14 | 2020-10-14 | Optical beam splitting device for receiving three bands through common window and application thereof |
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| CN (1) | CN112180551A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113746549A (en) * | 2021-10-27 | 2021-12-03 | 深圳市慧为智能科技股份有限公司 | Optical signal receiving multiplexing system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103278927A (en) * | 2013-06-21 | 2013-09-04 | 西安工业大学 | Two-waveband hole-diameter-shared light-path-shared zoom-shared imaging optical system |
| CN104035190A (en) * | 2014-06-05 | 2014-09-10 | 西安工业大学 | Integrated multi-waveband common-path synchronous continuous variable-focus optical system |
| CN106092039A (en) * | 2016-07-28 | 2016-11-09 | 南阳市诚辉光电有限责任公司 | A kind of rotary shaft bitubular range-finding telescope |
| CN110806584A (en) * | 2019-09-29 | 2020-02-18 | 四川大学 | Laser measuring device capable of performing measurement function conversion during measurement and test method |
-
2020
- 2020-10-14 CN CN202011097127.1A patent/CN112180551A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103278927A (en) * | 2013-06-21 | 2013-09-04 | 西安工业大学 | Two-waveband hole-diameter-shared light-path-shared zoom-shared imaging optical system |
| CN104035190A (en) * | 2014-06-05 | 2014-09-10 | 西安工业大学 | Integrated multi-waveband common-path synchronous continuous variable-focus optical system |
| CN106092039A (en) * | 2016-07-28 | 2016-11-09 | 南阳市诚辉光电有限责任公司 | A kind of rotary shaft bitubular range-finding telescope |
| CN110806584A (en) * | 2019-09-29 | 2020-02-18 | 四川大学 | Laser measuring device capable of performing measurement function conversion during measurement and test method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113746549A (en) * | 2021-10-27 | 2021-12-03 | 深圳市慧为智能科技股份有限公司 | Optical signal receiving multiplexing system |
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Application publication date: 20210105 |
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