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A full-frame lens that covers both visible and near-infrared light

A near-infrared light and full-frame technology, which is applied in the field of full-frame lenses, can solve the problems of single shooting light source environment and high processing cost of aspheric lenses, and achieve the effect of reduced processing and production difficulty, low manufacturing cost and good imaging

Active Publication Date: 2022-02-11
南京万生华态科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A full-frame lens that covers both visible and near-infrared light
  • A full-frame lens that covers both visible and near-infrared light
  • A full-frame lens that covers both visible 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 covering visible and near-infrared light at the same time, which sequentially includes the first lens group Group1 (plano-convex positive lens G1, convex-concave positive lens G2 and convex-concave negative lens) with positive refractive power from the object side to the image side. Cemented lens D1 made by cementing lens G3), meniscus negative lens G4, variable diaphragm s1, second lens group Group2 with positive refractive power (double concave negative lens G5 and double convex positive lens G6 are glued together Double mirror D2). The advantage of the present invention is that the spectral range is visible light and near-infrared light (470-910nm), which can meet the photography needs of photographers under visible light and near-infrared light; all lenses use spherical lenses, and various aberrations are corrected to meet the needs of use At the same time, the difficulty of processing and production is reduced. This design is composed of 6 spherical lenses, which 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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Patent Type & Authority Patents(China)
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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