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Optical filter and device using optical filter

An optical filter and wavelength technology, applied in optics, optical components, radiation control devices, etc., can solve problems such as fully improved color shading, image degradation, insufficient absorption intensity, etc., and achieves less dependence on incident angle and excellent cut-off characteristics , Excellent color shading suppression effect and ghosting suppression effect

Active Publication Date: 2021-06-08
JSR CORPORATIOON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 thiolene structure, but the absorption intensity around 700 nm is not sufficient
In particular, image degradation due to color shading may occur when used under high incident angle conditions (for example, 45-degree incident angles) that have been accompanied by lowering of camera modules in recent years.
[0006] 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 configuration described in Patent Document 5, color shading cannot be sufficiently improved. In the case of (for example, the patent document 5 Figure 5 The graphs of optical characteristics at 0° incidence and 30° incidence are shown in the figure, and a large wavelength shift was also observed at the edge of the visible light transmission band (630nm to 700nm) at 30° incidence)

Method used

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  • Optical filter and device using optical filter
  • Optical filter and device using optical filter
  • Optical filter and device using optical filter

Examples

Experimental program
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Embodiment

[0292] Hereinafter, the present invention will be described more specifically based on examples, but the present invention is not limited by these examples. 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.

[0293]

[0294] 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.

[0295] (a) Gel Permeation Chromatography (GPC) device (150C type, column: H type column produced by Tosoh (Tosoh) Company, developing solvent: o-dichlorobenzene) manufactured by Waters (WATERS) Company, The weight average molecular weight (Mw) and the number average molecular weight (Mn) in terms of standard polystyrene were measured.

[0296] (b) Using a GPC device manufactured by Tosoh Corporation (HLC-8220 type, column: TSKgelα-M, developing s...

Synthetic example

[0318] Compound (A) and compound (S) used in the following examples were synthesized by generally known methods. As a general synthesis method, 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, "Phthalocyanine -Chemistry and Function-" (IPC, 1997), Japanese Patent Laid-Open No. 2009-108267, Japanese Patent Laid-Open No. 2010-241873, Japanese Patent No. 3699464, Japanese Patent No. 4740631, etc. Methods.

[0319]

[0320] The 8-methyl-8-methoxycarbonyltetracyclo[4.4.0.1 represented by the following formula (a) 2,5 .1 7,10 ] 100 g of dode-3-ene (hereinafter also referred to as "DNM"), 18 g of 1-hexene (molecular weight modifier) ​​and 300 g of toluene (solvent for ring-opening polymerization reaction) were charged into a reaction vessel replaced with nitrogen, The solution was heated to 80°C. Then, 0.2 g of a toluene solution (0.6 mol / liter) of triethylaluminum ...

Embodiment 1

[0329] In Example 1, an optical filter having a base material including a transparent resin substrate was produced by the following procedures and conditions.

[0330] 100 parts of resin A obtained in Resin Synthesis Example 1, compound (a-1) represented by the following formula (a-1) as compound (A) (in dichloromethane (dichloromethane) The maximum absorption wavelength is 698nm) 0.04 parts and the compound (a-2) represented by the following formula (a-2) (the maximum absorption wavelength in dichloromethane is 733nm) 0.04 parts, as the compound (S) 0.07 parts of the compound (s-6) (maximum absorption wavelength in methylene chloride: 1093 nm) listed in Table 2-2 and methylene chloride were prepared to prepare a solution having a resin concentration of 20% by weight. The obtained solution was cast on a smooth glass plate, dried at 20° C. for 8 hours, and then peeled off from the glass plate. Furthermore, the peeled coating film was dried at 100 degreeC under reduced pressure...

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Abstract

An object of the present invention is to provide an optical filter and a device using the optical filter that can achieve a high level of both color shading suppression and ghosting suppression in camera images, which cannot be sufficiently achieved by conventional optical filters. The optical filter of the present invention is characterized by having a substrate satisfying the requirements (a) to (c): (a) having a layer containing a compound (A) having a maximum absorption in a wavelength range of 650 nm to 760 nm; (b) The shortest wavelength (X 1 ) and the second short wavelength (X 2 ) difference (X 2 -X 1 ) is 50nm or more; (c) the transmittance at wavelengths of 900nm, 1000nm and 1100nm is all 65% or less.

Description

technical field [0001] The invention relates to an optical filter and a device using the optical filter. Specifically, the present invention relates to an optical filter including a compound that absorbs in a specific wavelength region, and a solid-state imaging device and camera module using the optical filter. Background technique [0002] In solid-state imaging devices such as video cameras, digital still cameras, and mobile phones with camera functions, charge coupled devices (CCD) or complementary metal oxide semiconductors (CCDs) as solid-state imaging elements for color images are used. , CMOS) image sensors, these solid-state imaging elements use a silicon photodiode (silicon photodiode) sensitive to near-infrared rays that cannot be detected by human eyes in their light-receiving parts. Many of these solid-state imaging devices use optical filters (such as near-infrared cut filters) that must perform visibility correction to present natural colors seen by the human...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/22B32B7/023C09B23/00C09B47/04C09B57/00G02B5/26G02B5/28H01L27/146
CPCG02B5/20C09B23/00C09B57/00G02B5/26C09B47/04G02B5/28G02B5/22H01L27/146
Inventor 葛西达也长屋胜也堀内正子重冈大介
Owner JSR CORPORATIOON
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