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A new type of photographic lens

A photographic lens, a new type of technology, applied in the direction of optical components, optics, instruments, etc., can solve the problems of commercialization difficulties, processing and manufacturing difficulties, high cost, etc., and achieve the effect of soft outer focus, sharp inner focus and strong practicability

Active Publication Date: 2017-10-20
ANHUI CHANGGENG OPTICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the use of deformable lenses, processing and manufacturing are relatively difficult, commercialization is difficult, and the cost is relatively high

Method used

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  • A new type of photographic lens
  • A new type of photographic lens
  • A new type of photographic lens

Examples

Experimental program
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Effect test

no. 2 example

[0048] Such as Figure 4 As shown, the photographic lens of the first embodiment includes, from the object side, the first lens group Gr1 with positive diopter and the second lens group Gr2 with positive diopter. The second lens group Gr2 is at the farthest object end, and is equipped with a stop diaphragm ST1, and an aperture stop ST2 is arranged inside the second lens group, and a neutral negative lens A is arranged between the light stop stop ST1 and the aperture stop.

[0049] Infinity, spherical aberration, field curvature aberration, distortion aberration, and chromatic aberration of magnification at the maximum photographic magnification of the first embodiment are as follows Figure 5 shown.

[0050] The transmittance chart of neutral gray negative lens A from the center to the edge is as follows Figure 6 shown;

[0051] The data of the second example are as follows.

[0052] R(mm): Radius of curvature of each surface

[0053] D(mm): Each lens spacing and lens th...

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Abstract

The invention discloses a new type of photographic lens, which comprises a first lens group Gr1 with positive diopter and a second lens group Gr2 with positive diopter in order from the object side to the image surface side, and the first lens group Gr1 and the second lens group Gr2 Arrange stop diaphragm ST1 between them, arrange aperture stop ST2 inside the second lens group, and configure neutral gray negative diopter lens A between stop diaphragm ST1 and aperture stop ST2, and the object from infinity to When moving at a short distance, the above-mentioned first lens group Gr1 and second lens group Gr2 move toward the object side to achieve focus and meet the following conditions: 0.5≤|F / FA|≤2.5; the camera has a small It has the characteristics of modernization, high performance, sharp in-focus, and soft out-of-focus; the overall structure is simple, practical, and easy to popularize and use.

Description

technical field [0001] The invention relates to the technical field of camera lens applications, in particular to a new camera lens. Background technique [0002] At present, the well-known Japanese Patent Application No. Hei 11-231209 is composed of a first lens group Gr1 and a second lens group Gr2 from the object side, the diaphragm is located between the two lens groups, and the most object end of the second group The APD filter (Apodization optical element) is configured to realize the gradual darkening of the out-of-focus spot from the center to the edge, forming a natural and soft out-of-focus spot. However, since the refractive index of the ND filter glass used is very close to that of the cemented glass, the diopter of the APD filter is almost 0, or very weak, so it basically does not have much effect on correcting aberrations, so The aperture cannot be too large, and the performance cannot be better. [0003] There is also the well-known Japanese Patent Applicati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/00
Inventor 张小华
Owner ANHUI CHANGGENG OPTICS TECH CO LTD
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