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Large-field-of-view pinhole photography optical system

An optical system and pinhole camera technology, applied in optics, optical components, instruments, etc., can solve the problem of resolution performance bottleneck, small field of view of lens, poor imaging effect, etc. The effect of surveillance cameras

Active Publication Date: 2018-06-29
JIAXING ZHONGRUN OPTICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Due to the size limitation of the existing pinhole camera lens, the number of lenses that can be used is limited, and there is a certain bottleneck in the resolution performance; secondly, the small diameter of the front port leads to a small field of view of the lens, which cannot meet the monitoring and shooting functions of large scenes; There is less light, resulting in poor imaging effects in darker environments, and it is basically unusable in extremely low-light environments at night

Method used

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  • Large-field-of-view pinhole photography optical system
  • Large-field-of-view pinhole photography optical system
  • Large-field-of-view pinhole photography optical system

Examples

Experimental program
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Embodiment 1

[0039] Such as figure 2 As shown, the pinhole imaging lens of this embodiment includes sequentially along the light incident direction from the object plane side to the image plane side: a first lens G1 with double concave negative power, a diaphragm S, and a second lens with positive concave and rear convex power. Lens G2, the third lens with biconvex positive power G3, the fourth lens with positive concave and rear convex power G4, the fifth lens with double concave negative power G5, the sixth lens with double convex positive power G6, for filtering An optical filter IRCF for unnecessary wavelength bands of light and stray light, and an imaging surface IMG, wherein: the fourth lens and the fifth lens are cemented to form a cemented lens with a positive composite focal power.

[0040] In this embodiment, the first lens G1 , the second lens G2 and the sixth lens G6 are aspherical lenses.

[0041] The imaging surface IMG is provided with solid-state imaging elements such as ...

Embodiment 2

[0060] Such as Figure 7Shown is a cross-sectional view along the optical axis of the structure of the pinhole imaging lens of this embodiment. The pinhole imaging lens is arranged in sequence from the object plane side to the image plane side along the incident direction of the light rays, the first lens, the diaphragm, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the filter Light sheet, imaging surface. Among them: the first lens is biconcave negative power lens G1, the aperture S is located between the first lens and the second lens, the second lens is positive power lens G2 with front concave and back convex, and the third lens is biconvex positive power lens G3, the fourth lens is a positive power lens G4 with front concave and back convex, and the fifth lens is a biconcave negative power lens G5, and the fourth lens and the fifth lens are glued together to form a composite The refractive power is a cemented lens with positive power,...

Embodiment 3

[0081] Such as Figure 12 Shown is a cross-sectional view along the optical axis of the structure of the pinhole imaging lens of this embodiment. The pinhole imaging lens is arranged in sequence from the object plane side to the image plane side along the incident direction of the light rays, the first lens, the diaphragm, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the filter Light sheet, imaging surface. Among them: the first lens is biconcave negative power lens G1, the aperture S is located between the first lens and the second lens, the second lens is positive power lens G2 with front concave and back convex, and the third lens is biconvex positive power lens G3, the fourth lens is a positive power lens G4 with front concave and back convex, and the fifth lens is a biconcave negative power lens G5, and the fourth lens and the fifth lens are glued together to form a composite The refractive power is a cemented lens with positive powe...

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Abstract

A large-field-of-view pinhole photography optical system comprises, sequentially along a light incoming direction form the objective side to the image side, a double-concave first lens of negative focal power, a diaphragm, a front-concave rear-convex second lens of positive focal power, a double-convex third lens of positive focal power, a front-concave negative-convex fourth lens of positive focal power, a double-concave fifth lens of negative focal power, a double-convex sixth lens of positive focal power, a filter to filter light of unnecessary band and stray light, and an imaging side, wherein the fourth lens and the fifth lens are glued to form a glued lens of positive composite focal power. The specific lens-in-head combination node and specific material and parameters of lens bodiesare used, and the defect that a pinhole camera lens has low resolving power and small field of view is basically solved. The large-field-of-view pinhole photography optical system can support two megapixels, the half field of view is not greater than 65 degrees, and large-field-of-view monitoring filming is achieved.

Description

technical field [0001] The invention relates to a technology in the field of optical equipment, in particular to a pinhole imaging optical system that uses an aspheric lens, supports 2 million pixels, and has a field of view of more than 65°. Background technique [0002] Due to the size limitation of the existing pinhole camera lens, the number of lenses that can be used is limited, and there is a certain bottleneck in the resolution performance; secondly, the small diameter of the front port leads to a small field of view of the lens, which cannot meet the monitoring and shooting functions of large scenes; There is less light, resulting in poor imaging effects in darker environments, and it is basically unusable in extremely low-light environments at night. Contents of the invention [0003] Aiming at the above-mentioned deficiencies in the prior art, the present invention proposes a pinhole imaging optical system with a large field of view, which can support two million...

Claims

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Application Information

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IPC IPC(8): G02B13/00G02B13/06G02B13/18
CPCG02B13/0045G02B13/0055G02B13/006G02B13/06G02B13/18
Inventor 葛航笠盛亚茗尚洁阳
Owner JIAXING ZHONGRUN OPTICAL TECH