CN220795574U - Optical path length adjusting member, optical path length adjusting device, and optical path system - Google Patents
Optical path length adjusting member, optical path length adjusting device, and optical path system Download PDFInfo
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- CN220795574U CN220795574U CN202322671402.1U CN202322671402U CN220795574U CN 220795574 U CN220795574 U CN 220795574U CN 202322671402 U CN202322671402 U CN 202322671402U CN 220795574 U CN220795574 U CN 220795574U
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- 238000003384 imaging method Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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Abstract
The present disclosure relates to an optical path length adjusting member, an apparatus, and an optical path system, the optical path length adjusting member including a light-transmitting disc for rotatably disposed in the optical path system about a first axis parallel to and not coincident with an optical axis, the thickness of the light-transmitting disc in the optical axis direction uniformly varying in both the radial and circumferential directions of the light-transmitting disc; the light-transmitting disc comprises a compensation part, the compensation light-transmitting sheet is arranged on the compensation part, projections of the compensation light-transmitting sheet and the compensation part in the optical axis direction are mutually overlapped, the compensation light-transmitting sheet and the compensation part are constructed into a compensation unit, and the sizes of any positions of the compensation unit along the optical axis direction are equal. By arranging the compensation light-transmitting sheet, and the compensation parts on the compensation light-transmitting sheet and the light-transmitting disc are configured as compensation units, the sizes of any positions of the compensation units along the optical axis direction are equal, so that the distorted image can be effectively corrected in all directions.
Description
Technical Field
The present disclosure relates to the technical field of optical devices, and in particular, to an optical path length adjusting component, an optical path length adjusting device, and an optical path system.
Background
Focusing elements are also typically included in the optical path components of the instrument system. For cost saving and simplicity, lenses and image sensors in the optical path assembly are typically designed in a fixed structure with no adjustment room, and for slight changes in object position or optical path system, optical path length adjustment components need to be added to achieve focal plane adjustment on the image sensor for imaging clarity.
A commonly used optical path length adjustment member is a wedge prism in which 1 or more wedge prisms are inserted in the optical path that move perpendicular to the optical axis, see in particular US2258903 a.
Another simple and optimized optical path length adjustment member is a rotatable variable thickness optically transmissive disc that introduces optical paths of different thicknesses into the optical path by adjusting the rotational position of the disc. See publication number 20030067421A 1. Among such rotatable light-transmitting discs of variable thickness are also those of which publication numbers US200900800048A1 and US6066857a can be seen by adding wedge-shaped sheets or variable thickness.
In the publication US6066857a, referring to fig. 1, a rotatable disc of variable thickness is used, and in order to compensate for the difference in thickness of the disc, a wedge of narrow top and wide bottom is used for compensation. However, the outer diameter of the disc is not identical to the circumference of the inner diameter, and the vertical height of the outer diameter is reduced to a different extent from the vertical height of the inner diameter at the same circumference unit, that is, a square or rectangular area is taken on the variable disc, and the thickness in the Z-axis direction (optical axis) in the area is not identical in the X-axis direction and the Y-axis direction, which may cause distortion in image imaging. The thickness of each point in the Z-axis direction is different on the whole surface, and the thickness deviation of the point in the Z-axis direction on a certain line can only be compensated by using a wedge block with the upper narrow and the lower wide, and besides, the thickness of other points in the Z-axis direction is inconsistent, and image imaging distortion can also exist.
Disclosure of Invention
The disclosure aims to provide an optical path length adjusting component, an optical path length adjusting device and an optical path system, so as to solve the technical problems in the related art.
In order to achieve the above object, the present disclosure provides an optical path length adjustment member including a light-transmitting disc for rotatably disposing in an optical path system about a first axis parallel to an optical axis and not overlapping the optical axis, and a compensating light-transmitting sheet, the thickness of the light-transmitting disc in the optical axis direction uniformly varying in both radial and circumferential directions of the light-transmitting disc; the light-transmitting disc comprises a compensation part, the compensation light-transmitting sheet is arranged on the compensation part, projections of the compensation light-transmitting sheet and the compensation part in the optical axis direction are mutually overlapped, the compensation light-transmitting sheet and the compensation part are constructed into a compensation unit, and the sizes of any positions of the compensation unit along the optical axis direction are equal.
Optionally, the compensation part includes a first end, a second end, a third end, and a fourth end, where the first end has a first dimension along the optical axis, the second end has a second dimension along the optical axis, the third end has a third dimension along the optical axis, and the fourth end has a fourth dimension along the optical axis;
the compensating light-transmitting sheet comprises a first tip, a second tip, a third tip and a fourth tip, wherein the first tip has a fifth size along the optical axis direction, the second tip has a sixth size along the optical axis direction, the third tip has a seventh size along the optical axis direction, and the fourth tip has an eighth size along the optical axis direction;
the first end part and the first tip end are oppositely arranged along the optical axis direction, the second end part and the second tip end are oppositely arranged along the optical axis direction, the third end part and the third tip end are oppositely arranged along the optical axis direction, and the fourth end part and the fourth tip end are oppositely arranged along the optical axis direction;
wherein the sum of the first dimension and the fifth dimension, the sum of the second dimension and the sixth dimension, the sum of the third dimension and the seventh dimension, and the sum of the fourth dimension and the eighth dimension are equal.
Optionally, the projection of the compensation light-transmitting sheet in the optical axis direction is configured as a first rectangle, the projection of the compensation part in the optical axis direction is configured as a second rectangle, and the first rectangle and the second rectangle are mutually overlapped.
Optionally, the optical path length adjusting component further includes a reflecting prism, where the reflecting prism is disposed on the light-transmitting disc, the reflecting prism includes an incident surface and an exit surface, the incident surface is configured to receive an incident light parallel to the optical axis, and the incident surface is configured to reflect the incident light to the exit surface, and the exit surface is configured to reflect the light to form an exit light, and the incident light and the exit light are parallel to each other.
Optionally, the reflecting prism and the light-transmitting disc are constructed as an integrally molded structure.
Optionally, the light-transmitting disc comprises a disc body and a shaft sleeve, wherein a central hole is formed in the center of the disc body, and the shaft sleeve is fixed in the central hole and used for allowing the rotating shaft to pass through; or, a central hole is formed in the center of the light-transmitting disc, and the central hole is used for the rotating shaft to penetrate.
The disclosure also provides an optical path length adjusting device, the optical path length adjusting device includes mounting bracket, pivot and optical path length adjusting part, the pivot wear to establish the center of printing opacity disc and with printing opacity disc fixed connection, the pivot rotationally set up in the mounting bracket, just the axis of pivot extends along the optical axis.
Optionally, the mounting frame includes a first support and a second support, and the optical path length adjusting device further includes a driving portion, one end of the rotating shaft is rotatably disposed on the first support, the other end of the rotating shaft is rotatably disposed on the second support, and the driving portion is used for driving the rotating shaft to rotate.
Optionally, the driving part includes a stepper motor and a coupling, and the coupling connects a motor shaft of the stepper motor and the rotating shaft.
The present disclosure additionally provides an optical path system including the optical path length adjustment member or the optical path length adjustment device.
In the technical scheme, the light-transmitting disc is rotatably arranged in the light path system around the first axis which is parallel to the optical axis and is not coincident with the optical axis, and in the rotation process, the thickness of the light-transmitting disc at the same light path position is variable, so that the purpose of adjusting the light path length is achieved. By arranging the compensation light-transmitting sheet, the compensation parts on the compensation light-transmitting sheet and the light-transmitting disc are configured as compensation units, and the sizes of any positions of the compensation units along the optical axis direction are equal, so that the distorted image can be effectively corrected in all directions.
Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:
fig. 1 is a schematic view of a prior art optical path length adjusting member.
Fig. 2 is a schematic structural view of a light-transmitting disk of an optical path length adjustment member of an embodiment of the present disclosure.
Fig. 3 is a schematic structural view of a compensating light sheet of an optical path length adjusting part according to an embodiment of the present disclosure.
Description of the reference numerals
1. Light-transmitting disc 11 disc body
10. A first end of the compensation part 101
102. Second end 103 third end
104. Fourth end 12 sleeve
2. Compensating for the first tip of the light transmitting sheet 21
22. Second tip 23 third tip
24. Fourth tip 3 reflecting prism
31. Incidence plane 32 exit plane
a first axis
Detailed Description
Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.
As shown in fig. 2 and 3, the present disclosure provides an optical path length adjustment member including a light-transmitting disc 1 and a compensating light-transmitting sheet 2, the light-transmitting disc 1 being for being rotatably disposed in an optical path system about a first axis a parallel to and not coincident with an optical axis, the thickness of the light-transmitting disc 1 in the optical axis direction uniformly varying in both the radial and circumferential directions of the light-transmitting disc 1; the light-transmitting disc 1 comprises a compensation part 10, wherein the compensation part 10 is used for compensating the light-transmitting sheet 2, the compensation part 10 is arranged on the compensation part 10 of the light-transmitting disc 1, the projections of the compensation light-transmitting sheet 2 and the compensation part 10 in the optical axis direction are mutually overlapped, the compensation light-transmitting sheet 2 and the compensation part 10 are constructed as compensation units, and the sizes of any positions of the compensation units in the optical axis direction are equal.
In the above technical solution, the light-transmitting disc 1 is rotatably disposed in the optical path system around the first axis a parallel to the optical axis and not coincident with the optical axis, and in the rotation process, the thickness of the light-transmitting disc 1 at the same optical path position is variable, so as to achieve the purpose of adjusting the optical path length. By providing the compensation light-transmitting sheet 2, and the compensation section 10 on the compensation light-transmitting sheet 2 and the light-transmitting disk 1 is configured as a compensation unit, the dimensions of the compensation unit in the optical axis direction at any position are equal, so that the distorted image can be effectively corrected in each direction.
In one embodiment, referring to fig. 2 and 3, the compensation portion 10 includes a first end 101, a second end 102, a third end 103, and a fourth end 104, the first end 101 having a first dimension in the optical axis direction, the second end 102 having a second dimension in the optical axis direction, the third end 103 having a third dimension in the optical axis direction, and the fourth end 104 having a fourth dimension in the optical axis direction. The compensation light-transmitting sheet 2 includes a first tip 21, a second tip 22, a third tip 23, and a fourth tip 24, the first tip 21 having a fifth dimension in the optical axis direction, the second tip 22 having a sixth dimension in the optical axis direction, the third tip 23 having a seventh dimension in the optical axis direction, and the fourth tip 24 having an eighth dimension in the optical axis direction. The first end portion 101 and the first tip 21 are disposed opposite to each other in the optical axis direction, the second end portion 102 and the second tip 22 are disposed opposite to each other in the optical axis direction, the third end portion 103 and the third tip 23 are disposed opposite to each other in the optical axis direction, and the fourth end portion 104 and the fourth tip 24 are disposed opposite to each other in the optical axis direction; wherein the sum of the first dimension and the fifth dimension, the sum of the second dimension and the sixth dimension, the sum of the third dimension and the seventh dimension, and the sum of the fourth dimension and the eighth dimension are equal. For example, the thicknesses of the first dimension, the second dimension, the third dimension, and the fourth dimension are arranged in order from large to small; the thicknesses of the fifth dimension, the sixth dimension, the seventh dimension, and the eighth dimension are arranged in order from small to large.
Alternatively, the first size may be equal to the eighth size, the second size may be equal to the seventh size, the third size may be equal to the sixth size, and the fourth size may be equal to the fifth size. In this embodiment, the compensation light transmitting sheet 2 is understood to be rotated 180 degrees about the center with the compensation section 10, so that the dimensions of any position of the compensation unit constituted by the compensation light transmitting sheet 2 and the compensation section 10 in the optical axis direction are equal.
Alternatively, the projection of the compensation light transmitting sheet 2 in the optical axis direction is configured as a first rectangle, the projection of the compensation section 10 in the optical axis direction is configured as a second rectangle, and the first rectangle and the second rectangle coincide with each other. That is, the projection of the compensation light-transmitting sheet 2 in the optical axis direction is rectangular, but the present disclosure is not limited to the specific shape of the compensation light-transmitting sheet 2.
Optionally, referring to fig. 2, the optical path length adjusting part further includes a reflecting prism 3, the reflecting prism 3 is disposed on the light-transmitting disc 1, the reflecting prism 3 includes an incident surface 31 and an exit surface 32, the incident surface 31 is configured to receive incident light parallel to the optical axis, the incident surface 31 is configured to reflect the incident light to the exit surface 32, and the exit surface 32 is configured to reflect the light to form an exit light, and the incident light and the exit light are parallel to each other.
In this embodiment, by providing the reflection prism 3, the reflection prism 3 is used to realize origin detection in a limited space, that is, to detect the start position when the translucent disc 1 rotates in a limited space. For example, a light origin detection emitter is provided opposite to the incident surface 31 of the reflection prism 3, and a light origin detection receiver is provided opposite to the exit surface 32 of the reflection prism 3.
Alternatively, the reflecting prism 3 and the light-transmitting disk 1 are constructed as an integrally molded structure. Is convenient for forming. Alternatively, in other embodiments, the reflecting prism 3 may be configured as a separate structure from the light-transmitting disk 1.
In one embodiment, the light-transmitting disc 1 includes a disc body 11 and a sleeve 12, a center hole is formed in the center of the disc body 11, and the sleeve 12 is fixed in the center hole and is used for the rotating shaft to pass through. The rotation of the light-transmitting disc 1 is conveniently achieved, but the specific structure of the light-transmitting disc 1 is not limited by the present disclosure. Or, the center of the light-transmitting disc 1 is provided with a center hole for the rotating shaft to pass through, thereby reducing the arrangement of parts and effectively lowering the cost.
The present disclosure also provides an optical path length adjusting device, which includes a mounting frame (not shown), a rotating shaft (not shown) and the optical path length adjusting component, the rotating shaft penetrates through the center of the light-transmitting disc 1 and is fixedly connected with the light-transmitting disc 1, the rotating shaft is rotatably arranged on the mounting frame, and the axis of the rotating shaft extends along the optical axis. Through setting up mounting bracket and pivot, be convenient for realize the rotation of printing opacity disc 1.
Optionally, the mounting frame includes a first bracket (not shown) and a second bracket (not shown), and the optical path length adjusting device further includes a driving portion, one end of the rotating shaft is rotatably disposed on the first bracket, the other end of the rotating shaft is rotatably disposed on the second bracket, and the driving portion is used for driving the rotating shaft to rotate. By arranging the driving part, the automatic rotation of the light-transmitting disc 1 is convenient to realize. The present disclosure is not limited in the number of mounting frames, and the mounting frames may be provided as one.
For example, the driving part includes a stepping motor and a coupling, the coupling connecting a motor shaft and a rotating shaft of the stepping motor, or the motor shaft of the stepping motor is directly connected with the center hole, which is not limited in the present disclosure; in addition, the present disclosure is not limited to the specific type of the driving part.
The present disclosure additionally provides an optical path system including the above-described optical path length adjustment member or the above-described optical path length adjustment device.
The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.
In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, the present disclosure does not further describe various possible combinations.
Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.
Claims (10)
1. An optical path length adjusting member, characterized in that the optical path length adjusting member comprises a light-transmitting disc for being rotatably disposed in an optical path system about a first axis parallel to and not coincident with an optical axis, and a compensating light-transmitting sheet, the thickness of the light-transmitting disc in the optical axis direction being uniformly varied in both radial and circumferential directions of the light-transmitting disc; the light-transmitting disc comprises a compensation part, the compensation light-transmitting sheet is arranged on the compensation part, projections of the compensation light-transmitting sheet and the compensation part in the optical axis direction are mutually overlapped, the compensation light-transmitting sheet and the compensation part are constructed into a compensation unit, and the sizes of any positions of the compensation unit along the optical axis direction are equal.
2. The optical path length adjustment member according to claim 1, wherein the compensation portion includes a first end portion having a first dimension in the optical axis direction, a second end portion having a second dimension in the optical axis direction, a third end portion having a third dimension in the optical axis direction, and a fourth end portion having a fourth dimension in the optical axis direction;
the compensating light-transmitting sheet comprises a first tip, a second tip, a third tip and a fourth tip, wherein the first tip has a fifth size along the optical axis direction, the second tip has a sixth size along the optical axis direction, the third tip has a seventh size along the optical axis direction, and the fourth tip has an eighth size along the optical axis direction;
the first end part and the first tip end are oppositely arranged along the optical axis direction, the second end part and the second tip end are oppositely arranged along the optical axis direction, the third end part and the third tip end are oppositely arranged along the optical axis direction, and the fourth end part and the fourth tip end are oppositely arranged along the optical axis direction;
wherein the sum of the first dimension and the fifth dimension, the sum of the second dimension and the sixth dimension, the sum of the third dimension and the seventh dimension, and the sum of the fourth dimension and the eighth dimension are equal.
3. The optical path length adjustment member according to claim 2, wherein a projection of the compensation light transmitting sheet in the optical axis direction is configured as a first rectangle, and a projection of the compensation portion in the optical axis direction is configured as a second rectangle, the first rectangle and the second rectangle being overlapped with each other.
4. The optical path length adjustment member of claim 1, further comprising a reflective prism disposed on the light-transmitting disk, the reflective prism comprising an entrance face for receiving incident light parallel to the optical axis and an exit face for reflecting the incident light to the exit face, the exit face for reflecting the light to form an exit light, the incident light and the exit light being parallel to each other.
5. The optical path length adjustment member according to claim 4, wherein the reflecting prism and the light-transmitting disc are constructed as an integrally molded structure.
6. The optical path length adjusting member according to claim 1, wherein the light-transmitting disc includes a disc body having a center hole formed at a center thereof, and a sleeve fixed in the center hole for passing a rotation shaft therethrough; or, a central hole is formed in the center of the light-transmitting disc, and the central hole is used for the rotating shaft to penetrate.
7. An optical path length adjusting device, characterized in that the optical path length adjusting device comprises a mounting frame, a rotating shaft and the optical path length adjusting component according to any one of claims 1-6, wherein the rotating shaft penetrates through the center of the light-transmitting disc and is fixedly connected with the light-transmitting disc, the rotating shaft is rotatably arranged on the mounting frame, and the axis of the rotating shaft extends along an optical axis.
8. The optical path length adjustment device according to claim 7, wherein the mounting frame includes a first bracket and a second bracket, and the optical path length adjustment device further includes a driving portion, one end of the rotating shaft is rotatably disposed on the first bracket, the other end of the rotating shaft is rotatably disposed on the second bracket, and the driving portion is used for driving the rotating shaft to rotate.
9. The optical path length adjustment device according to claim 8, wherein the driving section includes a stepping motor and a coupling connecting a motor shaft of the stepping motor and the rotating shaft.
10. An optical path system comprising the optical path length adjustment member of any one of claims 1 to 6 or the optical path length adjustment device of any one of claims 7 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322671402.1U CN220795574U (en) | 2023-09-28 | 2023-09-28 | Optical path length adjusting member, optical path length adjusting device, and optical path system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322671402.1U CN220795574U (en) | 2023-09-28 | 2023-09-28 | Optical path length adjusting member, optical path length adjusting device, and optical path system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220795574U true CN220795574U (en) | 2024-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322671402.1U Active CN220795574U (en) | 2023-09-28 | 2023-09-28 | Optical path length adjusting member, optical path length adjusting device, and optical path system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220795574U (en) |
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2023
- 2023-09-28 CN CN202322671402.1U patent/CN220795574U/en active Active
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