Jsr Corporation

Nec Corporation

Takashi Tsubouchi

Katsuya Nagaya

Toshihiro Otsuki

Yukie Tanaka

Hiroyuki Kishida

Mitsuru Nakajima

Ran Mitsuboshi

Noboru Oshima

Takashi Imamura

Kenzo Ohkita

Daisuke Shigeoka

Tatsuya Sakai

Toshinori Sakagami

Mibuko Shimada

Koji Hatakeyama

An optical filter including a base member having a layer containing near-infrared absorbing fine particles and a dielectric multilayer film, the optical filter satisfying a requirement that, in a wavelength range of 400 nm to 650 nm, an average of transmittance of any of light incident from a direction perpendicular to the optical filter, light obliquely incident at an angle of 30 degrees, and light obliquely incident at an angle of 60 degrees is 45% or higher and lower than 85%; and a requirement that, in a wavelength range of 800 nm to 1,200 nm, an average of optical density (OD value) of any of light incident from the direction perpendicular to the optical filter, light obliquely incident at an angle of 30 degrees with respect to the perpendicular direction, and light obliquely incident at an angle of 60 degrees with respect to the perpendicular direction is 1.7 or higher.

Optical filter and ambient light sensor including optical filter

One object of the present disclosure is to show an optical filter capable of realizing both an excellent visible light transmittance and an excellent near-infrared ray-shielding performance even if an incident angle becomes large. The optical filter of the present disclosure has a base material (i) including a light absorbing layer, and transmits visible light, wherein the light absorbing layer has a maximum absorption in a wavelength range of 750 nm to 1,150 nm, and in a wavelength range of 850 nm to 1,050 nm, an average OD value measured in a direction perpendicular to the optical filter is 2.0 or more, and an average OD value measured at an angle of 60&#xb0; with respect to the direction perpendicular to the optical filter is 2.0 or more.

Optical filter having low incident angle dependence of incident light, ambient light sensor, sensor module and electronic device

The present invention intends to provide a solid-state imaging device having minimum production costs and high detection accuracy. A solid-state imaging device includes a first optical layer that transmits visible light and at least a part of near-infrared light, a second optical layer that absorbs at least a part of the near-infrared light and a pixel array that includes a first light-receiving element that detects the visible light transmitted through the first optical layer and the second optical layer and a second light-receiving element that detects the near-infrared light transmitted through the first optical layer, in which the second optical layer has an opening at a part corresponding to the second light-receiving element, the first optical layer includes a compound (A) having at least one absorption maximum at the wavelength of from 750 to 900 nm, the second optical layer includes a compound (B) having at least one absorption maximum at the wavelength of from 755 to 1050 nm, an absorption maximum wavelength on a longest wavelength side of the compound (B) is larger than an absorption maximum wavelength on the longest wavelength side of the compound (A), and a difference between both is from 5 to 150 nm.

Solid-state imaging device

The problem of the present invention is to overcome drawbacks of conventional optical filters such as near-infrared cut filters and to provide an optical filter which generates little scatted light even during light absorption and has excellent transmittance property. The optical filter of the present invention is characterized by containing a squarylium-based compound and a compound which absorbs or quenches fluorescence of the squarylium-based compound. The optical filter of the present invention preferably contains a near-infrared absorbing dye containing a squarylium compound (A) and at least one compound (B) selected from the group consisting of a phthalocyanine-based compound (B-1) and a cyanine-based compound (B-2).

Optical filter, and solid-state image pickup device and camera module using the optical filter

The present invention provides a near-infrared cut filter comprises a resin substrate (I) which comprises a resin and a light absorber (A) having a structure derived from a compound represented by the following Formula (I), wherein the light absorber (A) is contained in the resin substrate (I) in an amount of 0.001 to 0.01 parts by weight with respect to 100 parts by weight of the resin. 

Near-infrared cut filter and device including near-infrared cut filter

An optical filter comprises a base material (i) which comprises a transparent resin layer comprising a compound (Z) having an absorption maximum in the wavelength region of from 600 to 850 nm; and a dielectric multilayer film provided on at least one surface of the base material (i). The optical filter selectively transmits visible rays and a part of near-infrared rays, and the optical filter satisfies specific requirements.

Optical filter, solid-state image pickup device and camera module

A local oscillation light source outputs locally-oscillated light. An light receiving unit phase-separates an input optical signal by making the optical signal interfere with the locally-oscillated light and outputs an analog electric signal corresponding to the phase-separated optical signal. An analog-to-digital converting unit converts the analog electric signal into a digital signal. A processing unit performs digital signal processing by using the digital signal. A failure detection unit determines whether or not the optical signal is being input to the light receiving unit, or detects a failure in the light receiving unit, the analog-to-digital converting unit or the processing unit based on light intensity of the optical signal, whether or not the analog electric signal can be generated in the light receiving unit, and an amplitude of the analog electric signal output from the light receiving unit.

Receiver and failure detection method for receiver

A cyclic olefin addition copolymer includes a structural unit (1) derived from a cyclic olefin compound with a C4 alkyl substituent group and a structural unit (2) derived from a cyclic olefin compound with a C5-12 alkyl substituent group, and optionally includes a structural unit (3) derived from another cyclic olefin compound. The novel cyclic olefin addition copolymers according to the present invention are excellent in melt-formability, transparency and heat resistance, have low water absorption properties, low dielectric constant and low metal content, and are suitably used in optical parts such as optical films. Processes according to the present invention produce the cyclic olefin addition copolymers at high yield with small amounts of catalysts.

Cyclic olefin addition copolymer, process for production thereof, and retardation film obtained from the copolymer

A cyclic olefin addition copolymer obtained by copolymerizing a cyclic olefin compound having a side chain substituent group with a ring structure, such as endo-tricyclo[4.3.0.1]deca-3,7-diene or endo-tricyclo[4.3.0.1]deca-3-ene, with another cyclic olefin compound such as bicyclo[2.2.1]hept-2-ene, and further with a cyclic olefin compound having a hydrolysable silyl group as needed, or hydrogenating after copolymerization; a composition for crosslinking in which a specific crosslinking agent is incorporated; a crosslinked product obtained by crosslinking the composition; an optical material containing the copolymer, the composition or the crosslinked product; and a method for producing the copolymer in which addition polymerization is conducted using a specific nickel catalyst.

Cycloolefin addition copolymer and optical transparent material

A cyclic olefin having a specific polar group is polymerized by addition polymerization in a hydrocarbon solvent, using a polymerization catalyst component containing (i) a specific transition metal compound, (ii) a Lewis acid compound and (iii) an alkyl aluminoxane, or the cyclic olefin is polymerized by addition polymerization in the hydrocarbon solvent, using the polymerization catalyst component, by further adding at least one aromatic vinyl compound and at least one cyclic nonconjugated polyene compound, or either one of them as a molecular weight modifier, thereby obtaining a cyclic olefinic addition polymer.

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Tokyo, Japan

Takashi Tsubouchi