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Optical filters, camera modules and electronics

An optical filter, camera technology, applied to cameras, camera bodies, optics, etc., can solve the problems of inability to improve color shadows, insufficient absorption intensity, image degradation, etc., and achieve small incident angle dependence and excellent cut-off characteristics. , excellent color shadow suppression effect and ghost suppression effect

Active Publication Date: 2022-06-07
JSR CORPORATIOON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In Patent Document 4, broad absorption in the near-infrared wavelength region is achieved by using a compound mainly having a dithiolene structure, but the absorption intensity around 700 nm is not sufficient
In particular, when used under high incident angle conditions (for example, 45-degree incident angles) that have been accompanied by lower profile camera modules in recent years, image degradation due to color shading may occur
[0007] In addition, Patent Document 5 discloses a near-infrared cut filter having a near-infrared-absorbing glass substrate and a layer containing a near-infrared-absorbing pigment. However, even in the structure described in Patent Document 5, color shading cannot be sufficiently improved. Case

Method used

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  • Optical filters, camera modules and electronics
  • Optical filters, camera modules and electronics
  • Optical filters, camera modules and electronics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0366] Hereinafter, the present invention will be described in more detail based on examples, but the present invention is not limited by these examples at all. In addition, "part" means "mass part" unless otherwise indicated. In addition, the measurement method of each physical property value and the evaluation method of a physical property are as follows.

[0367]

[0368] The molecular weight of the resin is measured by the method of the following (a) or (b) in consideration of the solubility of each resin in a solvent and the like.

[0369] (a) Gel permeation chromatography (GPC) apparatus (150C type, column: H-type column manufactured by Tosoh, developing solvent: o-dichlorobenzene), manufactured by WATERS, was used, The mass average molecular weight (Mw) and the number average molecular weight (Mn) in terms of standard polystyrene were measured.

[0370] (b) The mass average molecular weight ( Mw) and number average molecular weight (Mn).

[0371] In addition, abou...

Synthetic example

[0393] The compound (A) and the near-infrared absorbing dye (X) used in the following examples were synthesized by a generally known method. Typical synthesis methods include, for example, Japanese Patent Laid-Open No. 60-228448, Japanese Patent Laid-Open No. 1-146846, Japanese Patent Laid-Open No. 1-228960, Japanese Patent No. 4081149, and Japanese Patent Laid-Open No. 1-228960. Japanese Patent Laid-Open No. 63-124054, "Phthalocyanine-Chemistry and Function-" (IPC, 1997), Japanese Patent Laid-Open No. 2007-169315, Japanese Patent Laid-Open No. 2009-108267, Japanese Patent Laid-Open No. 2010- The method described in Gazette No. 241873 and the like.

Synthetic example 1

[0395] 8-methyl-8-methoxycarbonyltetracyclo[4.4.0.1 represented by the following formula (a) 2，5 .1 7，10 ] 100 parts of dodec-3-ene (hereinafter, also referred to as "DNM"), 18 parts of 1-hexene (molecular weight regulator), and 300 parts of toluene (solvent for ring-opening polymerization) were charged into the nitrogen-substituted reaction In a vessel, the solution was heated to 80°C. Next, 0.2 part of a toluene solution (0.6 mol / liter) of triethylaluminum as a polymerization catalyst, and 0.9 part of a toluene solution (concentration 0.025 mol / liter) of methanol-modified tungsten hexachloride were added to the solution in the reaction vessel. The solution was heated and stirred at 80° C. for 3 hours, whereby a ring-opening polymerization reaction was performed to obtain a ring-opening polymer solution. The polymerization conversion rate in the polymerization reaction was 97%.

[0396] [Chemical 19]

[0397]

[0398] 1,000 parts of the thus obtained ring-opening polym...

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Abstract

The invention provides an optical filter, a camera module and electronic equipment. The optical filter of the present invention satisfies the necessary condition (a) and the necessary condition (b): (a) in the region of wavelength 430nm~580nm, the minimum value of the transmittance of the light incident from the vertical direction, and the relative vertical The minimum value of the transmittance of light incident in a direction inclined by 30 degrees, and the minimum value of the transmittance of light incident in a direction inclined by 60 degrees relative to the vertical direction are both more than 55% and less than 90%; (b ) In the wavelength range of 700nm to 780nm, the average value of the optical density relative to the light incident from the vertical direction, the average value of the optical density relative to the incident light from the direction inclined 30 degrees relative to the vertical direction, and the relative The average value of the optical density of the light incident from the direction inclined by 60 degrees with respect to the vertical direction was 1.8 or more.

Description

technical field [0001] The present invention relates to an optical filter, a camera module and an electronic device. In more detail, it relates to an optical filter having specific optical characteristics, a camera module using the optical filter, and an electronic device having the camera module. Background technique [0002] In solid-state imaging devices such as video cameras, digital still cameras, and mobile phones with camera functions, charge-coupled devices (CCDs) or complementary metal oxide semiconductors (complementary metal oxide semiconductors) are used as solid-state imaging elements for color images. , CMOS) image sensor. These solid-state imaging elements use silicon photodiodes (silicon photodiodes) having sensitivity to near-infrared rays that cannot be perceived by the human eye as light-receiving portions thereof. In these solid-state imaging elements, it is necessary to correct the visual sensitivity so as to give a natural color to the human eye, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/22G03B11/00H04N5/225G03B30/00
CPCG03B11/00G02B5/22H04N23/00G02B1/04C09D201/00C09D7/41C09B57/00G03B17/12H04N23/55
Inventor 田中幸恵长屋胜也岸田寛之
Owner JSR CORPORATIOON
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