Konica Corporation

Konica Minolta, Inc.

Konica Minolta Opto, Inc.

Shingo Nakamura

Tatsuo Ohta

Satoshi Nakano

Setsuo Tokuhiro

Tomokazu Taguchi

Kunihiko Taka

Munenori Kawaji

Katsuya Nakamura

Provided is a silver reflector capable of maintaining a high reflectivity achieved by using silver even under a hot and humid environment, wherein a film stress can be suppressed and a face deformation of an optical surface can be reduced, and a manufacture method therefor. A film stress after a reflection film is formed is within a range of +100 MPa to &#x2212;100 MPa, and a film stress after the reflection film is subjected to a hot and dry environment at 110&#xb0; C. for 24 hours and a film stress after the reflection film subjected to the environment is subjected to a hot and humid environment at 85&#xb0; C. and 85% RH for 24 hours are within a range of +100 MPa to &#x2212;100 MPa, and also an absolute value of a change amount between the former and latter film stress values is 40 MPa or lower.

Silver reflector, and manufacture method and examination method therefor

An antireflection coating provided on an optical element which passes through at least two wavelengths of light in the wavelength range of 1300-1600 nm, wherein the antireflection coating comprises: a high refractive index layer; a low refractive index layer having a refractive index lower than a refractive index of the high refractive index layer; and a supplementary layer having a composition different from a composition of the high refractive index layer or from a composition of the low refractive index layer, and being provided adjacent to the high refractive index layer or to the low refractive index layer.

Antireflection coating, optical element, and optical transceiver module

An electromagnetic wave attenuating transparent member includes; a transparent base material, and a plurality of structural layers including at least one transparent conductive layer. Sheet resistivity of the electromagnetic wave attenuating transparent member is 100 &OHgr;/cm,or less, and the plurality of structural layers include a first layer and a second layer which is provided to be farther than the first layer from the transparent base material, and has density which is higher than that of the first layer.

Electromagnetic wave attenuating transparent member

In an optical member having a coating for reducing a ray reflecting on the coating and for reducing an electromagnetic wave incident on the coating, the optical member includes: a transparent substrate; and the coating including, and formed on the transparent substrate in the order named from the transparent substrate, a first light transmitting thin layer having a high refractive index, a first light transmitting thin layer having a low refractive index, a second light transmitting thin layer having a high refractive index, a second light transmitting thin layer having a low refractive index. At least one of the first light transmitting thin layer having the high refractive index and the second light transmitting thin layer having the high refractive index is a transparent conductive layer having a sheet resistivity of 100 .OMEGA./.quadrature. or less.

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Hachioji, Japan

Shingo Nakamura