CN213957822U - Optical knife projection optical system - Google Patents
Optical knife projection optical system Download PDFInfo
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- CN213957822U CN213957822U CN202021652334.4U CN202021652334U CN213957822U CN 213957822 U CN213957822 U CN 213957822U CN 202021652334 U CN202021652334 U CN 202021652334U CN 213957822 U CN213957822 U CN 213957822U
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- lens
- optical system
- projection optical
- light path
- knife projection
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Abstract
The utility model belongs to the technical field of the optical projection, concretely relates to light sword projection optical system, including monochromatic source, leading light path, collimating mirror and lenticular lens, monochromatic source is towards leading light path, and leading light path is towards the collimating mirror, and the collimating mirror is towards lenticular lens, and lenticular lens is convex lens, and lenticular lens's longitudinal section is the rectangle. The problems that the optical projection magnification is not high enough and focusing is needed are solved.
Description
Technical Field
The utility model belongs to the technical field of the optical projection, concretely relates to light sword projection optical system.
Background
The principle of the existing optical projector is basically as follows: light emitted by the light source is condensed by the concave mirror and then passes through the screw lens (also called Fresnel lens), a transparent liquid crystal screen or a negative plate for projection imaging is placed at the screw lens, and then is focused by the convex lens and finally is reflected by the plane mirror to form an image on a projection plane.
In the optical projector in the prior art, the projection utilizes the convex lens imaging principle, focusing is needed when the projector is used, otherwise, an image is blurred, and the magnification ratio is usually about several times to more than ten times, so that the higher magnification ratio cannot be met, and the existing projector still has great limitation in the using process.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a light sword projection optical system to solve the problem that optics projection magnification is high inadequately and need focus.
In order to achieve the above purpose, the utility model discloses a scheme does: the optical knife projection optical system comprises a monochromatic light source, a front light path, a collimating lens and a cylindrical lens, wherein the monochromatic light source faces the front light path, the front light path faces the collimating lens, the collimating lens faces the cylindrical lens, the cylindrical lens is a convex lens, and the longitudinal section of the cylindrical lens is rectangular.
The working principle and the beneficial effects of the scheme are as follows: the front light path is used for uniformly diffusing the light emitted by the monochromatic light source and then injecting the light into the collimating lens. After the light of the monochromatic light source enters the collimating lens, the light beam has collimation property, namely parallel light beams, after the parallel light beams irradiate the cylindrical lens, a triangular prism-shaped focusing light area is formed on one side far away from the collimating lens, and the light beam focusing line position is a focusing line because the light beam is shaped like a knife edge, namely a knife edge. Focusing the line of focus on the film or template creates a magnified image of the film or template, which is magnified if the entire film or template is scanned by a light knife. The magnification is related to the imaging distance and to the spread angle of the optical knife. The larger the spread angle, the larger the magnification at the same imaging distance. The larger the imaging distance, the larger the magnification at the same diffusion angle. The thinner the focal line, the higher the sharpness of the image.
The scheme adopts geometric projection imaging, can image at any position in a diffusion space, has no limitation on magnification, and does not need focusing in imaging.
Optionally, the cross section of the collimator lens is circular and is not smaller than the circumscribed circle of the longitudinal section of the cylindrical lens. The longitudinal section is a section along the axis of the cylindrical lens, and the back surface (the side surface far away from one side of the focal line) of the whole cylindrical lens can be irradiated by the parallel light beams by the arrangement, so that the focal line is clear and continuous.
Optionally, the lenticular lens axis is curved. To form a curved focal line, so that the focal line scans a curved surface.
Optionally, the lenticular lens is one of a plano-convex lens, a biconvex lens or a meniscus lens.
Optionally, the monochromatic light source is a laser light source. The laser light source has good monochromaticity, strong directivity and high brightness.
Optionally, the optical device further comprises a first plane mirror, and the first plane mirror is located on a light path of the side of the cylindrical lens far away from the collimator lens. The position of the focal line is adjusted by the first plane mirror.
Optionally, the optical system further comprises a second plane mirror, the second plane mirror is located on a light path on a side of the cylindrical lens away from the collimating mirror, and the second plane mirror and the first plane mirror are arranged in opposite directions. The position of the focal line is adjusted more flexibly through the matching of the first plane mirror and the second plane mirror.
Optionally, the first plane mirror and the second plane mirror are both movably coupled to the adjusting base, and a driving device for driving the first plane mirror and the second plane mirror to move is installed on the adjusting base. The driving device is used for driving the first plane reflecting mirror or the second plane reflecting mirror to rotate, translate or do compound motion, and the position of the focal line is dynamically adjusted, so that the focal line can scan a non-plane.
Optionally, the front optical path is a focusing lens. The focusing lens ensures the uniformity of the light diffusion of the monochromatic light source and avoids overlarge focal length.
Optionally, the focusing lens is a hemispherical lens. The monochromatic light source light can be uniformly diffused within an extremely short distance.
Drawings
Fig. 1 is a schematic view of an optical path structure of a middle-optical-blade projection optical system according to an embodiment of the present invention;
fig. 2 is a schematic view of a partial structure in the second embodiment of the present invention.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the device comprises a laser light source 1, a semi-sphere passing lens 2, a collimating lens 3, a concave-convex lens 4, a focusing line 5, a light knife 6, a negative plate 7, a first plane reflector 8, a second plane reflector 9, a back plate 10, a voice coil motor 11 and an adjusting seat 12.
Example one
This embodiment is substantially as shown in fig. 1: the optical knife 6 projection optical system comprises a laser light source 1, a half-sphere lens 2, a collimating lens 3 and a concave-convex lens 4, wherein the laser light source 1 faces the half-sphere lens 2, the half-sphere lens 2 faces the collimating lens 3, the collimating lens 3 faces the concave-convex lens 4, the orthographic projection of the outer contour of the concave-convex lens 4 in the direction of an optical axis is rectangular, the cross section of the collimating lens 3 is circular and is larger than the circumscribed circle of the rectangle, and the concave-convex lens 4 is completely arranged in the irradiation range of light rays of the collimating lens 3.
The laser light source 1 has good monochromaticity, strong directivity and high brightness, after passing through the hemispherical lens 2, the laser light source is uniformly diffused in a short distance and then enters the collimating lens 3, then parallel light beams are emitted from the other end of the collimating lens 3, the parallel light beams irradiate the concave-convex lens 4 to form a light beam of the light knife 6, and the light beam is focused to form a slender focusing line 5. Focusing the line of focus on the film 7 or template forms a magnified strip image, and if the knife 6 is scanned across the film 7, a magnified image of the entire film 7 is formed.
Example two
The present embodiment is substantially as shown in fig. 2, and is different from the first embodiment in that: a first plane reflector 8 and a second plane reflector 9 are arranged between the concave-convex lens 4 and the focusing line 5, the second plane reflector 9 and the first plane reflector 8 are respectively arranged on two sides of the optical knife 6 and are arranged oppositely, the second plane reflector 9 and the first plane reflector 8 are respectively arranged on a back plate 10, the back plate 10 is respectively connected with an adjusting seat 12 in a spherical hinge mode, three voice coil motors 11 are further respectively arranged on the adjusting seats 12, and the free ends of the voice coil motors 11 are connected with the back plate 10.
By controlling the voice coil motor 11, the deflection angle between the second plane mirror 9 and the first plane mirror 8 can be accurately controlled, and the position of the focal line 5 can be dynamically and flexibly adjusted through mirror reflection, so that the focal line 5 can scan a non-plane.
The above description is only an example of the present invention, and the common general knowledge of the known specific structures and characteristics of the embodiments is not described herein. It should be pointed out that to those skilled in the art, without departing from the structure of the present invention, a plurality of modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the utility of the present invention.
Claims (10)
1. Light sword projection optical system, its characterized in that: the device comprises a monochromatic light source, a front light path, a collimating lens and a cylindrical lens, wherein the monochromatic light source faces the front light path, the front light path faces the collimating lens, the collimating lens faces the cylindrical lens, the cylindrical lens is a convex lens, and the longitudinal section of the cylindrical lens is rectangular.
2. The optical knife projection optical system according to claim 1, characterized in that: the cross section of the collimating lens is circular and is not less than the circumscribed circle of the longitudinal section of the cylindrical lens.
3. The optical knife projection optical system according to claim 1, characterized in that: the lenticular lens axis is curved.
4. The optical knife projection optical system according to claim 1, characterized in that: the lenticular lens is one of a plano-convex lens, a biconvex lens, or a meniscus lens.
5. The optical knife projection optical system according to claim 1, characterized in that: the monochromatic light source is a laser light source.
6. The optical knife projection optical system according to claim 1, characterized in that: the first plane reflector is positioned on a light path of one side of the cylindrical lens, which is far away from the collimating mirror.
7. The optical knife projection optical system according to claim 6, characterized in that: the second plane reflector is positioned on a light path of one side of the cylindrical lens, which is far away from the collimating mirror, and the second plane reflector and the first plane reflector are arranged in opposite directions.
8. The optical knife projection optical system according to claim 7, characterized in that: the first plane mirror and the second plane mirror are both movably connected to the adjusting seat, and the adjusting seat is provided with a driving device for driving the first plane mirror and the second plane mirror to move.
9. The optical knife projection optical system according to claim 1, characterized in that: the front light path is a focusing lens.
10. The optical knife projection optical system according to claim 9, characterized in that: the focusing lens is a hemispherical lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021652334.4U CN213957822U (en) | 2020-08-10 | 2020-08-10 | Optical knife projection optical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021652334.4U CN213957822U (en) | 2020-08-10 | 2020-08-10 | Optical knife projection optical system |
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| Publication Number | Publication Date |
|---|---|
| CN213957822U true CN213957822U (en) | 2021-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021652334.4U Active CN213957822U (en) | 2020-08-10 | 2020-08-10 | Optical knife projection optical system |
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| CN (1) | CN213957822U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116819857A (en) * | 2023-08-22 | 2023-09-29 | 苏州默然光电科技有限公司 | Lighting unit, visual detection system and method thereof |
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2020
- 2020-08-10 CN CN202021652334.4U patent/CN213957822U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116819857A (en) * | 2023-08-22 | 2023-09-29 | 苏州默然光电科技有限公司 | Lighting unit, visual detection system and method thereof |
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