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Full-frame lens capable of simultaneously covering visible light and near-infrared light

A near-infrared light, full-frame technology, applied in the field of full-frame lenses, can solve the problems of single light source environment for shooting, high processing cost of aspherical lenses, etc., and achieve the effects of reduced processing and production difficulty, low manufacturing cost, and good imaging.

Active Publication Date: 2021-12-24
南京万生华态科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Purpose: In order to overcome the problems of the singleness of the light source environment of the full-frame SLR lens in the prior art (only visible) and the high cost of processing the aspheric lens, the present invention provides a full-frame lens that covers both visible and near-infrared

Method used

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  • Full-frame lens capable of simultaneously covering visible light and near-infrared light
  • Full-frame lens capable of simultaneously covering visible light and near-infrared light
  • Full-frame lens capable of simultaneously covering visible light and near-infrared light

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with specific examples.

[0028] A full-frame lens that simultaneously covers visible and near-infrared light, including the first lens group Group1 with positive refractive power, meniscus-shaped negative lens G4, variable diaphragm s1, and positive refractive power from the object side to the image side The second lens group Group2.

[0029] The first lens group Group1 includes a plano-convex positive lens G1 and a positive lens cemented lens group D1. The first lens group Group1 optical power φ Group1 Satisfy 1.9Group1 / φ<2.3, where φ is the focal power of the full-frame lens.

[0030] Among them, the convex surface of G1 faces the object side, and its focal power satisfies 0.5G1 / φ Group1 D1 / φ Group1 <0.5.

[0031] Among them, the cemented lens group D1 is composed of a convex-concave positive lens G2 and a convex-concave negative lens G3. The convex surfaces of the convex-concave positive le...

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Abstract

The invention discloses a full-frame lens capable of simultaneously covering visible light and near-infrared light. From an object space to an image space, the lens sequentially comprises a first lens group Group 1 (a cemented lens D1 formed by cementing a plano-convex positive lens G1, a convex-concave positive lens G2 and a convex-concave negative lens G3) with positive focal power, a meniscus negative lens G4, an iris diaphragm s1, and a second lens group Group 2 (a cemented lens D2 formed by cementing a biconcave negative lens G5 and a biconvex positive lens G6) with positive focal power. The invention has the advantages that: the spectral range is visible light and near-infrared light (470-910nm), and the shooting requirements of photography enthusiasts under the visible light and the near-infrared light are met at the same time; and all the lenses are spherical lenses, various aberrations are corrected, and the processing and production difficulty is reduced while the use requirements are met. The design is composed of six spherical lenses, and has the advantages of good imaging of visible light and near-infrared light and low manufacturing cost.

Description

technical field [0001] The invention relates to a full-frame lens that simultaneously covers visible and near-infrared light, and belongs to the technical field of camera lenses. Background technique [0002] In the field of face modeling, it is necessary to take photos of multiple groups of models with different expressions. If the photos are taken under visible light conditions and exposed to the flash for a long time, the human eyes will suffer from fatigue, glare and other discomfort. At the same time, the photos taken by the models must be perfect. To restore the details of the face, the lens is required to have a high imaging quality. In addition, some current photographers use lenses designed for visible light when shooting scenes. If they shoot under near-infrared light, due to lens design defects, there will be shortcomings in the photos that lack details. [0003] In order to correct the aberration and improve the imaging quality of the existing SLR lens, more asp...

Claims

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Application Information

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IPC IPC(8): G02B13/00G02B13/14
CPCG02B13/00G02B13/146
Inventor 郁晓晖彭程于加标韩旭
Owner 南京万生华态科技有限公司
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