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Catadioptric optical system and camera device

A technology of optical systems and camera devices, applied in optics, optical components, instruments, etc., can solve the problems of limited magnification range, reduced image quality, difficult total lens length, etc., and achieve the effect of excellent imaging performance

Active Publication Date: 2022-04-15
TAMRON +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This digital zoom lens is a function that eliminates the need to physically move components like an optical zoom lens, but if the image is enlarged too much, the image quality will deteriorate
Due to this image degradation, there is a limit to the range that can be zoomed in with digital zoom
[0011] On the other hand, the reality is that it is very difficult to form an optical zoom lens with a desired zoom ratio to a desired total lens length

Method used

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  • Catadioptric optical system and camera device
  • Catadioptric optical system and camera device
  • Catadioptric optical system and camera device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0137] like figure 1 As shown, the structure of the catadioptric optical system of the first embodiment has a first lens L1 and a second lens L2.

[0138] The first lens L1 has a refraction surface R1 (first refraction surface) in the peripheral area of ​​the object side surface, and has a second reflection surface M2 in the central area of ​​the object side surface of the first lens L1. In addition, the first lens L1 has a refractive surface R2 in the peripheral area of ​​the imaging side surface, and has a refractive surface R5 and a refractive surface R6 in the central area of ​​the imaging side surface of the first lens L1.

[0139] The peripheral area of ​​the object-side surface of second lens L2 has a refractive surface R3, and the central area of ​​the object-side surface of second lens L2 has a refractive surface R4 and a refractive surface R7. In addition, the second lens L2 has a first reflective surface M1 in the peripheral region of the image-side surface, and h...

no. 2 example

[0148] like image 3 As shown, the structure of the catadioptric optical system of the second embodiment has a first lens L1 and a second lens L2.

[0149] The first lens L1 has a refraction surface R1 (first refraction surface) in the peripheral area of ​​the object side surface, and has a second reflection surface M2 in the central area of ​​the object side surface of the first lens L1. In addition, the first lens L1 has a refractive surface R2 in the peripheral area of ​​the imaging side surface, and has a refractive surface R5 and a refractive surface R6 in the central area of ​​the imaging side surface of the first lens L1.

[0150] There is a refraction surface R3 in the peripheral area of ​​the object side surface of the second lens L2, and there are refraction surfaces R4 and R7 in the center area of ​​the object side surface of the second lens L2, and, in the second lens L2 The peripheral area of ​​the image-side surface has a first reflective surface M1, and the cen...

no. 3 example

[0159] like Figure 5 As shown, the structure of the catadioptric optical system of the third embodiment has a first lens L1 and a second lens L2.

[0160] The first lens L1 has a refraction surface R1 (first refraction surface) in the peripheral area of ​​the object side surface, and has a second reflection surface M2 in the central area of ​​the object side surface of the first lens L1. In addition, the first lens L1 has a refractive surface R2 in the peripheral area of ​​the imaging side surface, and has a refractive surface R5 and a refractive surface R6 in the central area of ​​the imaging side surface of the first lens L1.

[0161] The second lens L2 has a refractive surface R3 in the peripheral area of ​​the object-side surface, and has a refractive surface R4 and a refractive surface R7 in the central area of ​​the object-side surface of the second lens L2. In addition, the second lens L2 has a first reflective surface M1 in the peripheral region of the image-side sur...

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Abstract

The invention provides a catadioptric optical system and an imaging device. Thin catadioptric optical system providing specified imaging performance, bright and long focal length with small low back coefficient. A catadioptric optical system and an imaging device including the catadioptric optical system, the catadioptric optical system being a coaxial twice catadioptric optical system having a first The lens and the second lens form a first refracting surface in the peripheral area of ​​the object side surface of the first lens, form a second reflection surface in the central area of ​​the object side surface of the first lens, and form a second reflection surface in the second lens The peripheral area of ​​the imaging side surface of the second lens forms the first reflective surface, and forms the second refracting surface in the central area of ​​the imaging side surface of the second lens, and satisfies the prescribed conditions related to the effective diameters of the first reflecting surface and the second reflecting surface .

Description

technical field [0001] The present invention relates to a catadioptric optical system and an imaging device, and more specifically relates to an imaging device that is bright and thin in the direction of the optical axis and that can be properly mounted on a mobile phone, a mobile device, a robot, an in-vehicle device, etc. A thin catadioptric optical system and an imaging device equipped with the catadioptric optical system. Background technique [0002] Conventionally, in order to reduce the protruding amount of the imaging system of a mobile phone from its approximate thickness, etc., in the field of various devices, it is desired to be thin in the optical axis direction, that is, from the first surface of the lens on the subject side to the imaging position. Thin catadioptric optical system with short "total lens length" of the distance on the optical axis. [0003] As a conventional thin catadioptric optical system, such as Figure 14 As shown, an optical system is pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/00G02B17/08
CPCG02B13/003G02B13/0065G02B17/0808G02B17/086
Inventor 佐藤拙平川纯田中幸夫水上雅文
Owner TAMRON
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