Nikon Vision Co., Ltd.

Nikon Corporation

Toshihiko Kurata

Akiko Miyakawa

Miho Matsumoto

An optical element formed by stacking each of two resin layers on a glass substrate, wherein when the second resin layer of the two resin layers counting from the glass substrate is formed, an external circumferential part of the second resin layer is formed so as to be located inward of the outer circumferential part of the first resin layer, which is located closer to the glass substrate than the second resin layer.

Optical element

An achromatic lens system is provided with a cemented resin lens having positive refractive power constructed by a resin lens Lhaving positive refractive power cemented with a resin lens Lhaving negative refractive power, and a close-contact multi-layer type diffractive optical element LE, the diffractive optical element LE being disposed to an image side of the cemented resin lens, the diffractive optical element LE being constructed by cementing two diffractive element members DE, DEeach made of different optical materials with each other, and the cemented surface thereof being a diffractive optical surface Gf on which grooves of a diffraction grating are formed, there by being lightweight and easily manufactured, capable of excellently correcting chromatic aberration and spherical aberration at the same time.

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Yamato, Japan

Toshihiko Kurata