Optical Filters and Their Applications

An optical filter and wavelength technology, which is applied in the field of optical filters, can solve problems such as difficulty in detecting accurate illuminance or color tone misoperation, insufficient reflow soldering process, and reduced incident volume. It achieves excellent near-infrared cut-off ability and incident Small angle dependence and improved crack resistance

Active Publication Date: 2021-08-03
JSR CORPORATIOON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] On the other hand, in order to emphasize the designability of information terminal devices, it is required to reduce the transmittance of the transmissive window that allows light to enter the ambient light sensor (make it a blackened appearance), but there is the following problem: the difference between visible light and infrared light Reduced incident light makes it difficult to detect accurate illuminance or color tone and cause malfunction
[0009] However, the near-infrared cut filter described in Patent Document 3 also has the problem that its heat resistance is not higher than the glass transition temperature of the base material, and it is not sufficient for the reflow process, so that it cannot be used in multiple Used in reflow soldering process

Method used

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  • Optical Filters and Their Applications
  • Optical Filters and Their Applications
  • Optical Filters and Their Applications

Examples

Experimental program
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Embodiment

[0382] Hereinafter, although an Example demonstrates this invention more concretely, this invention is not limited to the said Example at all. In addition, "part" means a "weight 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.

[0383]

[0384] The molecular weight of the resin is measured by the following method (a) or (b) in consideration of the solubility of each resin in a solvent and the like.

[0385] (a) Gel Permeation Chromatography (GPC) device (150C type, column: H-type column manufactured by Tosoh Company, developing solvent: o-dichlorobenzene) manufactured by Waters (WATERS) was used, The weight average molecular weight (Mw) and the number average molecular weight (Mn) of standard polystyrene conversion were measured.

[0386] (b) Using a GPC device manufactured by Tosoh Corporation (HLC-8220 type, column: TSKgel α-M, developing solvent: tetrah...

Synthetic example 1

[0398] Add 35.12g (0.253mol) of 2,6-difluorobenzonitrile, 87.60g (0.250mol) of 9,9-bis(4-hydroxyphenyl) fluorene, 41.46g (0.300mol) of potassium carbonate in a 3L four-necked flask. mol), N,N-dimethylacetamide (hereinafter also referred to as "DMAc (Dimethylacetamide)") 443 g, and toluene 111 g. Next, a thermometer, a stirrer, a three-way cock with a nitrogen inlet tube, a water separation (Dean-Stark) tube, and a cooling tube were installed in the four-necked flask. Next, after replacing the inside of the flask with nitrogen, the obtained solution was reacted at 140° C. for 3 hours, and the generated water was removed from the water separation tube as needed. When generation of water was not confirmed, the temperature was gradually raised up to 160° C., and the reaction was carried out at the temperature for 6 hours. After cooling to room temperature (25° C.), generated salts were removed with filter paper, the filtrate was poured into methanol for reprecipitation, and the f...

Synthetic example 2

[0400] The 8-methyl-8-methoxycarbonyltetracyclo[4.4.0.1 represented by the following formula (8) 2，5 .1 7，10 ] 100 parts of dodec-3-ene (hereinafter also referred to as "DNM"), 18 parts of 1-hexene (molecular weight modifier) ​​and 300 parts of toluene (solvent for ring-opening polymerization reaction) were put into a reaction vessel replaced with nitrogen , the solution was heated to 80 °C. Then, 0.2 parts of a toluene solution (0.6 mol / liter) of triethylaluminum and 0.9 parts of a toluene solution (concentration 0.025 mol / liter) of methanol-modified tungsten hexachloride were added to the solution in the reaction vessel as a polymerization catalyst, the solution was heated and stirred at 80° C. for 3 hours to perform ring-opening polymerization to obtain a ring-opened polymer solution. The polymerization conversion rate in the polymerization reaction was 97%.

[0401] [chemical 17]

[0402]

[0403] 1,000 parts of the ring-opened polymer solution thus obtained was put...

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Abstract

The present invention provides an optical filter capable of providing excellent visible light even when the incident angle becomes large as the profile of equipment equipped with a solid-state imaging device or an ambient light sensor is lowered, and an application thereof. Transmittance, near-infrared cut performance, and heat resistance (reflow resistance) are excellent, and crack resistance is improved. The optical filter of the present invention is characterized in that it has a transparent resin base material and a dielectric multilayer film formed on at least one surface of the base material, and satisfies specific requirements, wherein the transparent resin base material includes A compound (A) having an absorption maximum at a wavelength of 600 nm to 800 nm.

Description

technical field [0001] The invention relates to an optical filter and its application. More specifically, it relates to an optical filter including a pigment compound having absorption in a specific wavelength range, a solid-state imaging device including the optical filter, a camera module, an ambient light sensor, and an electronic device including the ambient light sensor. . Background technique [0002] In recent years, the development of ambient light sensors has been promoted for use in information terminal devices such as smartphones and tablet terminals. The ambient light sensor in the information terminal device is used as an illuminance sensor that senses the illuminance of the environment where the information terminal device is placed and adjusts the brightness of the display, or senses the color tone of the environment where the information terminal device is placed and A color sensor that adjusts the color tone of a display, etc. [0003] In order to match h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/22
CPCG02B5/223G02B5/20G01J1/04B32B7/023C08K5/3417C08K5/29C08L101/00
Inventor 大桥幸恵长屋胜也堀内正子大月敏敬
Owner JSR CORPORATIOON
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