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Lens optical unit and imaging device

An optical unit and lens technology, applied in optical elements, optics, electrical components, etc., can solve the problems of restricting the size reduction of optical units, difficult to reduce size, etc., and achieve the effect of improving magnification and high field curvature correction.

Active Publication Date: 2013-03-27
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, this significantly limits the size reduction of the optical unit
Especially in a bright lens with a shallow F-number (bright lens) with a shallow depth of focus, this limitation is large, and it is difficult to reduce the size

Method used

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  • Lens optical unit and imaging device
  • Lens optical unit and imaging device
  • Lens optical unit and imaging device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0117] image 3 The lens configuration of the lens optical unit 1 according to the first embodiment of the present technology is shown.

[0118] The lens optical unit 1 includes a first positive lens G1, a first negative lens G2, a second negative lens G3, and a second positive lens G4 arranged in this order from the object side to the image side.

[0119] The first positive lens G1 is formed in the form of a crescent lens convex to the object side, the first negative lens G2 is formed in the form of a crescent lens convex to the object side, and the cemented lens consists of the first positive lens G1 and the first negative lens. G2 configuration.

[0120] The second negative lens G3 is formed as a cemented lens concave toward the object side.

[0121] The second positive lens G4 is formed as a cemented lens concave toward the object side.

[0122] The aperture stop STO is arranged between the first negative lens G2 and the second negative lens G3.

[0123] The cover glas...

no. 2 example

[0137] Figure 5 The lens configuration of the lens optical unit 2 according to the second embodiment of the present technology is shown.

[0138] The lens optical unit 2 includes a first positive lens G1, a first negative lens G2, a second negative lens G3, and a second positive lens G4 arranged in order from the object side to the image side.

[0139] The first positive lens G1 is formed in the form of a crescent lens convex to the object side,

[0140] The first negative lens G2 is formed as a meniscus lens convex to the object side.

[0141] The second negative lens G3 is formed in a biconcave shape, the second positive lens G4 is formed in a biconvex shape, and a cemented lens is configured by the second negative lens G3 and the second positive lens G4.

[0142] The aperture stop STO is arranged between the first negative lens G2 and the second negative lens G3.

[0143] The cover glass CG is arranged on the object side of the imaging plane IMG close to the imaging pla...

no. 3 example

[0158] Figure 7 The lens configuration of the lens optical unit 3 according to the third embodiment of the present technology is shown.

[0159] The lens optical unit 3 includes a first positive lens G1, a first negative lens G2, a second negative lens G3, and a second positive lens G4 arranged in order from the object side to the image side.

[0160] The first positive lens G1 is formed in the form of a crescent lens convex to the object side,

[0161] The first negative lens G2 is formed as a meniscus lens convex to the object side.

[0162] The second negative lens G3 is formed in a biconcave shape, the second positive lens G4 is formed in a biconvex shape, and a cemented lens is configured by the second negative lens G3 and the second positive lens G4.

[0163] The aperture stop STO is arranged between the first negative lens G2 and the second negative lens G3.

[0164] The cover glass CG is arranged on the object side of the imaging plane IMG close to the imaging plan...

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Abstract

Provided are a lens optical unit and an imaging device. The lens optical unit includes at least one lens arranged at an object side of a solid-state image sensor. An imaging plane of the image sensor has a non-planar shape causing a sag amount in an optical axis direction to increase as a distance from an optical axis increases, and satisfies the expression: [rho]Sag>0, where [rho] represents a Petzval curvature of an optical unit, rk represents a curvature radius of a kth lens surface from the object side, nk represents a refractive index of a medium before being incident to the kth lens surface from the object side, n'k represents a refractive index of a medium after being emitted from the kth lens surface from the object side, and Sag represents a sag amount in the optical axis direction related to a given point other than the optical axis on the imaging plane.

Description

technical field [0001] The technology relates to a lens optical unit and an imaging device. More specifically, the present technology relates to lens optical units and imaging devices that are particularly suitable for digital still cameras, video cameras, surveillance cameras, etc. that employ solid-state image sensors as compact high-performance imaging units. Background technique [0002] In recent years, the market for imaging devices such as digital cameras has remarkably grown, and users' demands for digital cameras and the like have become more diverse. In addition, in recent years, there have been increasing demands for the brightness of photographing lenses and increasing the size of imaging elements that effectively realize low-noise photographing and high dynamic range, not to mention improvements in image quality, size reduction, and thickness reduction. Require. [0003] As we all know, when the size of the imaging element increases, the lens optical unit incr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B7/10G02B13/18G02B5/00H04N5/232H04N25/00
CPCG02B13/006G02B13/0035H04M1/00H04N5/3696H04N5/2257G02B13/004G02B13/18G02B9/36H04N23/55G03B13/32
Inventor 山野裕贵
Owner SONY CORP