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Optical system of photographic field lens

A technology of optical system and photographic objective lens, which is applied in the field of objective optical system, can solve problems affecting system imaging quality, distortion, field curvature, etc., and achieve the effect of simple system structure and favorable mass production

Inactive Publication Date: 2007-07-18
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

However, since the imaging objective optical system needs to perform imaging in a large field of view, this optical system often has serious field curvature and distortion in a large field of view, which affects the imaging quality of the system.

Method used

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  • Optical system of photographic field lens

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Embodiment Construction

[0032] According to the optical structure in Figure 1, a 1.3 million-pixel photographic objective lens optical system is designed. The technical indicators of the optical system are shown in Table 1, and the specific design parameters of the optical system are shown in Tables 2, 3, and 4.

[0033] The image quality of the system is close to the diffraction limit, the radius of the diffuse spot is less than 5μm, and the size of the diffuse spot in each field of view is balanced; in the central field of view, at 250lp / mm, the modulation transfer function (MTF) is greater than 0.3, in the peripheral field of view, at 125lp / mm mm, MTF greater than 0.3.

[0034] Table 1

[0035] System Specifications

Detector size

2.56mm*2.048mm

pixel size

2um*2um

F / n

System aperture:

Effective focal length:

Paraxial half-image height representation

field of view

center wavelength

MTF

2.8

φ1.466mm

4.1045mm

±2.85mm(±35°) ...

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Abstract

An optical system of photographic field lens is formed by setting the first convex-refraction high order non-spherical lens, the second convex -refraction high order non-spherical lens, concave-refraction high order non-spherical lens and planar lens in sequence from object space to image space.

Description

technical field [0001] The present invention relates to optical elements and systems, in particular to an objective optical system for photography, which requires ±35° field of view and 0.4861μm-0.6563μm band optical imaging. Background technique [0002] At present, the optical system of photographic objective lens mostly adopts Cooke's three-piece optical system and its improved optical system. The advantages of this optical system are: simple structure, convenient processing and assembly. However, since the imaging objective optical system needs to perform imaging within a large field of view, this optical system often has serious field curvature and distortion in a large field of view, which affects the imaging quality of the system. Therefore, how to eliminate distortion and correct field curvature is particularly important. Contents of the invention [0003] The object of the present invention is to propose a photographic objective optical system capable of eliminat...

Claims

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Application Information

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IPC IPC(8): G02B9/34G02B13/18G02B1/04
Inventor 程仕东裴云天王淦泉
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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