Dual focal length lens system
First Claim
1. A dual focal length optical system comprising:
- a first optical system positioned along an optical path, the first optical system including an optical structure having an object side surface and an image side surface, the first optical system also including a first reflective surface of an intermediate reflective element located between the object side surface and the image side surface of the optical structure as viewed along the optical path, the first optical system having a first focal length; and
a second optical system sharing a portion of the same optical path and including a second reflective surface of the same intermediate reflective element as that of the first optical system, the second optical system having a second focal length, the first focal length of the first optical system being longer than the second focal length of the second optical system.
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Abstract
A dual focal length optical system includes a first optical system and a second optical system. The first optical system is positioned along an optical path and includes an optical structure having an object side surface and an image side surface. The first optical system also includes a first surface of an intermediate reflective element located between the object side surface and the image side surface of the optical structure as viewed along the optical path. The first optical system has a first focal length. The second optical system shares a portion of the same optical path and includes a second surface of the same intermediate reflective element as that of the first optical system. The second optical system has a second focal length. The first focal length of the first optical system is longer than the second focal length of the second optical system.
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Citations
20 Claims
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1. A dual focal length optical system comprising:
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a first optical system positioned along an optical path, the first optical system including an optical structure having an object side surface and an image side surface, the first optical system also including a first reflective surface of an intermediate reflective element located between the object side surface and the image side surface of the optical structure as viewed along the optical path, the first optical system having a first focal length; and a second optical system sharing a portion of the same optical path and including a second reflective surface of the same intermediate reflective element as that of the first optical system, the second optical system having a second focal length, the first focal length of the first optical system being longer than the second focal length of the second optical system. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A dual focal length optical system comprising:
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a first optical system positioned along an optical path, the first optical system including an optical structure having an object side surface and an image side surface, the first optical system also including a first surface of an intermediate reflective element located between the object side surface and the image side surface of the optical structure as viewed along the optical path, the first optical system having a first focal length; a second optical system sharing a portion of the same optical path and including a second surface of the same intermediate reflective element as that of the first optical system, the second optical system having a second focal length, the first focal length of the first optical system being longer than the second focal length of the second optical system; and a second intermediate element associated with the first optical system, the second intermediate element including an optical surface positioned along a portion of the optical path that is not shared by the second optical system. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A dual focal length optical system comprising:
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a first optical system positioned along an optical path, the first optical system including an optical structure having an object side surface and an image side surface, the first optical system also including a first surface of an intermediate reflective element located between the object side surface and the image side surface of the optical structure as viewed along the optical path, the first optical system having a first focal length; and a second optical system sharing a portion of the same optical path and including a second surface of the same intermediate reflective element as that of the first optical system, the second optical system having a second focal length, the first focal length of the first optical system being longer than the second focal length of the second optical system; wherein the image side surface of the optical structure of the first optical system being a first image side surface of the optical structure, the second optical system including the object side surface of the optical structure and a second surface of the optical structure that is not shared by the first optical system; and wherein the second surface of the optical structure includes optical power. - View Dependent Claims (14)
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15. A dual focal length optical system comprising:
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a first optical system positioned along an optical path, the first optical system including an optical structure having an object side surface and an image side surface, the first optical system also including a first surface of an intermediate reflective element located between the object side surface and the image side surface of the optical structure as viewed along the optical path, the first optical system having a first focal length; a second optical system sharing a portion of the same optical path and including a second surface of the same intermediate reflective element as that of the first optical system, the second optical system having a second focal length, the first focal length of the first optical system being longer than the second focal length of the second optical system; a first image sensor associated with the first optical system; and a second image sensor associated with the second optical system. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification