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Near infra red cut filter, and device comprising the same

A cut-off filter, near-infrared technology, applied in the direction of filters, instruments, filters, etc. for photography, can solve the problem of insufficient viewing angle value, etc., and achieve the effect of small incident angle dependence and wide viewing angle.

Active Publication Date: 2010-06-23
JSR CORPORATIOON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The near-infrared cut filter described in Patent Document 2 is excellent in near-infrared cut capability, moisture absorption resistance, and impact resistance, but cannot obtain a sufficient viewing angle value.

Method used

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Embodiment

[0258] Hereinafter, although an Example demonstrates this invention, this invention is not limited at all by these Examples. In addition, "part" and "%" mean "part by weight" and "% by weight" unless otherwise indicated.

[0259] First, the measurement method of each physical property value and the evaluation method of a physical property are demonstrated.

[0260] (1) Molecular weight:

[0261] Using a Gel Permeation Chromatography (GPC) device (Model 150C) manufactured by WATERS Corporation equipped with an H-type column manufactured by TOSOH, under the conditions of o-dichlorobenzene solvent and 120°C, the weight in terms of standard polystyrene was measured. Average molecular weight (Mw) and number average molecular weight (Mn).

[0262] (2) Glass transition temperature (Tg):

[0263] Using a differential scanning calorimeter (DSC6200) manufactured by Seiko Instruments, the measurement was performed at a rate of temperature increase: 20° C. per minute, under a nitrogen ...

Synthetic example 1

[0272] The 8-methyl-8-methoxycarbonyltetracyclo[4.4.0.1 shown in the following formula (2) 2，5 .1 7，10 ] 100 parts of dode-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 charged to the nitrogen-substituted reaction In a container, the solution was heated to 80°C. Next, 0.2 parts of a toluene solution (0.6 mol / L) of triethylaluminum as a polymerization catalyst and 0.9 parts of a toluene solution (concentration 0.025 mol / L) of methanol-modified tungsten hexachloride were added to the solution in the reaction vessel. The ring-opening polymerization reaction was performed by heating and stirring the solution at 80° C. for 3 hours to obtain a ring-opening polymer solution. The polymerization conversion rate of this polymerization reaction was 97%.

[0273]

[0274] 1000 parts of the ring-opening polymer solution obtained in this way are packed in...

Synthetic example 2

[0277] Sufficiently carry out drying, and in the 1L stainless steel reaction vessel that is replaced with nitrogen, the water content of 6ppm dehydrated cyclohexane 420.4g, p-xylene 180.2g, 5-trimethoxysilyl-bicyclo[2.2. 1] 48.75 mmol (10.43 g) of hept-2-ene, 1425 mmol (134.1 g) of bicyclo[2.2.1] hept-2-ene, and charged with gaseous ethylene so that the internal pressure of the reactor reached 0.1 MPa.

[0278] The reactor was heated to 75°C, and 0.003 milligram atoms of 2-ethylhexanoic acid palladium (as Pd atom) and 0.0015 mmol of tricyclohexylphosphine were reacted in 10 ml of toluene at 25° C. for 1 hour as a catalyst component to obtain a solution. The entire amount of the obtained solution and 0.00315 mmol of triphenylcarbenium pentafluorophenylborate were added in this order to start polymerization.

[0279] 90 minutes after the start of polymerization, 11.25 mmol (2.41 g) of 5-trimethoxysilyl-bicyclo [2.2.1] hept-2-ene was added, and then 7.5 mmol (1.61 g), 3.75 mmol (...

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Abstract

The present invention relates to a near infrared cut filter and a device comprising the same. The aim of the invention is to provide the near infrared cut filter which has the advantages of wide visual angle, excellent near infrared cutting performance, low hygroscopicity, no foreign matter or warp. The near infrared cut filter is characterized in that the transmissivity satisfies the conditions (A) to (D): (A), in the wavelength range 430-580nm, the average value of transmissivity is more than 75%; (B) in the wavelength range 800-1000 nm, the average value of transmissivity is less than 20%; (C) the absolute value of the difference between a large wavelength with a transmissivity of 70% in the wavelength area less than 800nm and a shortest wavelength with a transmissivity of 30% in the wavelength area larger than 580nm; and (D) in the wavelength area of 560-800nm, the absolute value of the difference between a wavelength value with a transmissivity of 50% when determined in a vertical direction in the wavelength area of 560-800nm and a wavelength value with a transmissivity of 50% when determined in a direction at an angle of 30 DEG relatively to the vertical direction in the wavelength range 560-800nm.

Description

technical field [0001] The present invention relates to a near-infrared cut filter. More specifically, the present invention relates to a near-infrared cut filter having a sufficient viewing angle and particularly suitably used as a visibility correction filter for solid-state imaging devices such as CCDs and CMOSs. Background technique [0002] In recent years, televisions equipped with plasma display panels (PDPs) have been commercialized and widely used in ordinary households. This PDP is known as a display that operates by plasma discharge, and generates near-infrared rays (wavelength: 800 to 1000 nm) during plasma discharge. [0003] On the other hand, in the home, near-infrared rays are often used in the remote controls of home appliances such as TVs, stereos, and air conditioners, and in the information exchange of personal computers. It is often pointed out that the near-infrared rays generated by PDPs are the cause of misoperation of these devices. The possibility...

Claims

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Application Information

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IPC IPC(8): G02B5/20
CPCB32B7/02G02B5/22G02B5/26G03B11/00
Inventor 浅野贵之坪内孝史
Owner JSR CORPORATIOON
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