Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Tatsutoshi Suenaga

Satoshi Tamaki

Katsumi Imada

Akiko Murata

Yuka Okada

Taizou Hamada

In a diffraction optical element having a structure in which a base and an optical adjustment layer adhere to each other, defects such as cracks and peeling occur in the optical adjustment layer, when the adhesive strength between the base and the optical adjustment layer is degraded. In a diffraction optical elementof the present invention, a plurality of anchor groovesare formed in a planar second regionof a base. Further, a depth of an anchor groove of the plurality of anchor grooves, which is positioned on an outermost side, is designed so as to be smaller than a depth of another anchor groove of the plurality of anchor grooves, which is positioned on an innermost side. An optical adjustment layeradheres so as to cover a first regionin which a diffraction gratingis formed and the second regionin which the anchor groovesare formed of the base

Diffraction optical element and production method therefor

According to a method for producing a diffraction optical element, the center of a molding face and the center of a substrate are positionally aligned to each other based on a marker of a prescribed shape which is formed at the center of the molding face of a mold and the shape of a diffraction grating of the substrate. A nanocomposite material is located between the molding face and the diffraction grating, and the material is pressed by the mold and the substrate to form an optical adjusting layer on the diffraction grating.

Method for producing diffractive optical element, and diffractive optical element, including a diffraction grating and molded optical adjusting layer

An optical filter array () having a plurality of optical filters (to) and a light shielding block () having light shielding walls (to) forming a plurality of openings (to) independent from each other are placed between a lens module () integrally having a plurality of lenses (to) arranged on a single plane and a plurality of imaging regions (to). The light shielding block is provided with first sliding surfaces (to). The lens module is provided with second sliding surfaces (to) sliding on the first sliding surfaces so that the lens module can rotate with respect to the light shielding block with an axis normal to the plurality of imaging regions as a rotation center axis. Thus, a small, thin, and low-cost compound eye camera module can be realized.

Compound eye camera module and method of producing the same

A compound eye camera module according to the present invention includes a lens array including at least two lenses; an imaging element having two imaging areas corresponding to the two lenses; a light shielding block having a light shielding wall for separating optical paths of light transmitted through the two lenses; an optical filter for transmitting light of a specific wavelength range among the light transmitted through the two lenses; and a substrate having an opening larger than the optical filter. The imaging areas and the optical filter are located at a position corresponding to the opening. The imaging element is fixed to a face of the substrate opposite to the side of the lens array. The imaging element is in contact with a face of the optical filter which faces the imaging element. The light shielding block is fixed to a face of the optical filter which faces the light shielding block. The optical filter has portions protruding outside both of ends of the imaging element in a direction connecting the two optical axes of the two lenses. The light shielding block is fixed to the protruding portions of the optical filter.

Compound eye camera module

Provided is a foreign matter inspection method for positively detecting a foreign matter in the neighborhood of the edge of a mirror-finished substrate without fail. Edge-emphasis and binarization are performed following the taking of an image of a substrate-under-inspection at a contour of its inspection area, to further detect a plurality of sampling points representative of a contour of the inspection area. An estimated inspection area is determined by determining the size, position and rotation angle of contour lines defined, size-reducibly, from the coordinates of the plurality of sampling points. After applying a mask to the binary image data in an area other than the estimated inspection area, a foreign-matter detection step is performed.

Method for inspecting a foreign matter on mirror-finished substrate

A lens module () that includes a plurality of lenses (), a plurality of optical filters () corresponding to the individual lenses (), an imaging device () that includes a plurality of imaging regions () corresponding to the individual optical filters (), and a light-shielding wall (to) that is provided perpendicularly to the imaging device () are provided. The adjacent imaging regions () are partitioned by the light-shielding wall (). The light-shielding wall () includes a plurality of inclined surfaces () that are inclined with respect to an imaging plane of the imaging regions (), and the plurality of inclined surfaces () are disposed sequentially from a side of the lens module () to a side of the imaging regions (). Each of the inclined surfaces () is inclined toward the side of the imaging regions () with increasing distance from the light-shielding wall ().

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Osaka, Japan

Tatsutoshi Suenaga