阅读说明：本技术 变形物镜系统和形成具有不同焦距的变形物镜组件的方法 (Anamorphic objective lens system and method of forming an anamorphic objective lens assembly having different focal lengths ) 是由 伊恩·A·尼尔 于 2020-02-14 设计创作，主要内容包括：本申请公开了变形物镜系统和形成具有不同焦距的变形物镜组件的方法。变形物镜系统(100LS)和用于形成具有不同焦距(FLY)并利用前变形部分(20)和两个或更多个非变形部分(50(i))的集合的变形物镜组件(100(i))的集合的方法。非变形部分与前变形部分光学地匹配,并且它们的前端(52)被配置为容易附接到前变形部分的后端(24)和从前变形部分的后端(24)分离以产生具有不同焦距的变形物镜组件。因为变形物镜系统仅使用单个前变形部分和多个非变形附件,所以与对于期望焦距中每一个使用单独的变形物镜相比,具有多个变形物镜组件的成本显著降低。(An anamorphic objective lens system and method of forming an anamorphic objective lens assembly having different focal lengths are disclosed. An anamorphic objective lens system (100LS) and method for forming a set of anamorphic objective lens assemblies (100(i)) having different Focal Lengths (FLY) and utilizing a front anamorphic portion (20) and a set of two or more non-anamorphic portions (50 (i)). The non-deformed portions are optically matched with the front deformed portions, and their front ends (52) are configured to be easily attached to and detached from the rear ends (24) of the front deformed portions to produce deformed objective lens assemblies having different focal lengths. Because the anamorphic objective lens system uses only a single front anamorphic portion and a plurality of non-anamorphic attachments, the cost of having a plurality of anamorphic objective lens assemblies is significantly reduced as compared to using a separate anamorphic objective lens for each of the desired focal lengths.)

1. An anamorphic objective lens system having orthogonal vertical and horizontal directions and comprising, along an optical axis and in order from object space to image space:

a front anamorphic portion having a rear end and an anamorphic lens group having first and third axially stationary lens subgroups in an object space-most direction and an image space-most direction, respectively, and a second lens subgroup axially movable between the first and third lens subgroups for focusing, wherein the front anamorphic lens group comprises at least two anamorphic lens elements; and

a set of two or more non-anamorphic portions, each non-anamorphic portion having a front end and a non-anamorphic lens group, the non-anamorphic lens group being axially stationary and optically mated with the anamorphic lens group of the front anamorphic portion, wherein the front end is configured to be removably connected to the rear end of the front anamorphic portion to define one of a set of two or more anamorphic objective lens assemblies having different vertical focal lengths.

2. The anamorphic objective system of claim 1, wherein the front anamorphic portion includes a focus scale having a calibration, and wherein the two or more anamorphic objective lens assemblies have respective first and second axial lengths that are the same to be within an axial length tolerance that maintains the calibration of the focus scale.

3. The anamorphic objective lens system of claim 1, wherein:

the third lens subgroup defines a rearmost lens surface of the front anamorphic portion, wherein the rearmost lens surface has a clear aperture diameter CA; and

wherein a first of the two or more anamorphic objective lens assemblies has a first image space F-number and a shortest focal clear aperture CA ═ CA_SAnd a second of the two or more anamorphic objective lens assemblies has a second image space F-number and a longest focal clear aperture CA ═ CA_LAnd wherein CA is performed when said first and second image space F numbers are the same_S≤CA_L。

4. Anamorphic objective system of claim 3, wherein CA_S<CA_L。

5. The anamorphic objective lens system of claim 1, wherein a first of the two or more anamorphic objective lens assemblies has a first vertical focal length that is the shortest vertical focal length FLY1 and a second of the two or more anamorphic objective lens assemblies has a second vertical focal length that is the longest vertical focal length FLY2, and wherein the shortest vertical focal length FLY1 and the longest vertical focal length FLY2 define a vertical focal length ratio RYFL ═ 1.25< FLY2/FLY1< 100.

6. The anamorphic objective system of claim 1, wherein the rear end of the front anamorphic portion and the front ends of the two or more non-anamorphic portions include respective lens mounting fixtures configured to operably engage and disengage.

7. The anamorphic objective lens system of claim 1, wherein the non-anamorphic lens group includes lens elements, and wherein all of the lens elements are spherical lens elements.

8. The anamorphic objective lens system of claim 1, wherein the at least two anamorphic lens elements in the anamorphic lens group comprise at least one cylindrical lens element.

9. The anamorphic objective system of claim 1, wherein the at least two anamorphic lens elements are comprised of:

a single cylindrical lens element having optical power in a first (X) direction in the first lens subgroup;

a single cylindrical lens element having optical power in a second (Y) direction perpendicular to the first direction in the second lens subgroup;

four cylindrical lens elements in the third lens subgroup, foremost two of the four cylindrical lens elements having power in the second (Y) direction, and remaining rearmost two cylindrical lens elements having power in the first (X) direction.

10. The anamorphic objective system of claim 1, wherein each of the non-anamorphic lens groups of the non-anamorphic portion includes an aperture stop defining an F-number for each anamorphic lens assembly of the anamorphic objective assembly.

11. The anamorphic objective system of claim 1, wherein the front anamorphic portion includes a focus dial having a focus scale that remains calibrated when different ones of the two or more non-anamorphic portions are operably attached to the front anamorphic portion one at a time.

12. The anamorphic objective lens system of claim 1, wherein one of the at least two anamorphic lens elements comprises an object space-most anamorphic lens element, and wherein the first lens group comprises one or more non-anamorphic lens elements having zero or positive power in common between the object space and the object space-most anamorphic lens element.

13. The anamorphic objective system of claim 12, wherein the at least one non-anamorphic lens element comprises at least one spherical lens element.

14. A camera system, comprising:

the anamorphic objective system of any of claims 1 to 13, wherein the front anamorphic portion comprises a first lens barrel and the first and second non-anamorphic portions each comprise a respective second lens barrel, each second lens barrel having a rear end;

a camera housing having an interior and a front end supporting a lens mounting fixture to which and from which the rear end of the second lens barrel is operatively attached and detached, one at a time;

an image sensor operatively disposed within an interior of the camera housing and at an image surface in the image space of the anamorphic objective system when the lens barrel is attached to the camera housing; and

camera electronics electrically connected to the image sensor.

15. A camera system, comprising:

the set of anamorphic objective lens assemblies in the anamorphic objective lens system of any one of claims 1 to 13;

a camera housing having an interior and a front end supporting a lens mounting fixture to which each of the anamorphic objective lens assemblies in the set of anamorphic objective lens assemblies is operatively attached and detached one at a time;

an image sensor operably disposed within the interior of the camera housing and at an image surface common to each of the anamorphic objective lens assemblies in the set of anamorphic objective lens assemblies; and

camera electronics electrically connected to the image sensor.

16. A method of using a camera to perform deformation imaging for an imaging application at different vertical focal lengths, comprising:

providing a front anamorphic portion having a rear end and comprising an anamorphic lens group, the anamorphic lens group comprising an axially movable lens subgroup;

attaching a first non-anamorphic portion to the rear end of the front anamorphic portion, the first non-anamorphic portion comprising a first non-anamorphic lens group optically matched to the anamorphic lens group and having only a stationary first non-anamorphic lens element and a first aperture stop to form a first anamorphic objective lens assembly having a first vertical focal length FLY1 and a first axial lens length;

performing a first imaging process with the first anamorphic objective lens assembly to form a first suitable image for the imaging application;

removing the first non-anamorphic portion from the rear end of the front anamorphic portion and attaching a second non-anamorphic portion to the rear end, the second non-anamorphic portion comprising a second non-anamorphic lens group having only a stationary second non-anamorphic lens element and a second aperture stop to form a second anamorphic objective lens assembly having a second vertical focal length FLY 2; and

performing a second imaging process with the second anamorphic objective lens assembly to form a second suitable image for the imaging application.

17. The method of claim 16, wherein:

performing the first imaging process includes operably attaching the first anamorphic objective lens to a camera having an image sensor and capturing a first image with the image sensor; and

performing the second imaging process includes removing the first anamorphic objective lens from the camera and operably attaching the second anamorphic objective lens to the camera and capturing a second image with the image sensor.

18. The method of claim 16, wherein:

providing the set of two or more non-deformed portions comprises providing at least three non-deformed portions having a shortest focal length, a longest focal length, and a median focal length between the shortest and longest focal lengths, respectively;

the shortest focal length non-anamorphic portion forms the vertical focal length FLY1 of the first anamorphic objective lens assembly as the shortest vertical focal length and the longest focal length non-anamorphic portion forms the second vertical focal length FLY2 of the first anamorphic objective lens assembly as the longest vertical focal length, such that FLY2> FLY 1; and

the first (shortest) and second (longest) vertical focal lengths FLY1, FLY2 define a ratio RYFL ═ FLY2/FLY1, wherein 1.25< RYFL < 100.

19. The method of any of claims 16 to 18, wherein:

the axially movable second lens subgroup for focusing has at least one non-rotationally symmetric surface;

the focusing is performed using a focus scale with calibration on the front deformation; and the first and second anamorphic objective lens assemblies have first and second axial lengths, respectively, that are the same to be within an axial length tolerance that maintains calibration of the focus scale.

20. An anamorphic objective system comprising, along an optical axis and in order from an object space to an image space:

a front anamorphic portion having a rear end and comprising an anamorphic lens group comprising at least two non-rotationally symmetric surfaces and comprising a first axially stationary lens subgroup in an object space direction and a third axially stationary lens subgroup in an image space direction and a second lens subgroup between the first and third lens subgroups, wherein the second lens subgroup is axially movable for focusing and wherein the third lens subgroup defines a rearmost optical surface closest to the rear end of the front anamorphic portion, wherein one of the at least two non-rotationally symmetric surfaces is present in one of the first and second lens subgroups and the other of the two non-rotationally symmetric surfaces is present in the third lens subgroup; and

a plurality of rear non-anamorphic portions, each rear non-anamorphic portion removably attached to the rear end of the front anamorphic portion to form a plurality of anamorphic objective lens assemblies defining a set of anamorphic objective lens assemblies, each of the plurality of rear non-anamorphic portions comprising a vertical direction and a plurality of axially stationary and non-anamorphic lens groups, wherein the non-anamorphic lens groups optically match the front anamorphic portion to define a different vertical focal length for each of the anamorphic objective lens assemblies, the vertical focal lengths comprising a shortest vertical focal length and a longest vertical focal length, the shortest vertical focal length defining a first image space F-number and a first clear aperture diameter CA for the rearmost optical surface_SThe longest vertical focal length defining a second image space F-number and a second clear aperture diameter CA for the last optical surface_LAnd wherein CA is performed when the first image space F number and the second image space F number are the same_S≤CA_L。