IMAGING OPTICAL SYSTEM, IMAGING DEVICE

WIPO Patent Application WO/2013/171969

A1

The invention is related to an imaging optical system that performs image formation for imaging for infrared and terahertz waves in particular, and provides for preventing a drop in image formation performance while providing for cost reduction. The invention is an imaging optical system: provided with a first lens (11) provided near an aperture diaphragm (10) and responsible for aberration correction, and provided with a second lens (12) placed between the first lens (11) and an imaging element, and responsible for light condensation; and in which the first lens (11) is a gradient index lens. The gradient index lens has a higher design degree of freedom than a lens with a uniform refractive index, and has high potential as an element for a lens. By using this type of gradient index lens, aberration correction can be achieved without performing high-cost processing such as polishing, for example. By means of this structure, it is possible to provide for preventing the drop in image formation performance, while providing for the cost reduction.

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SAITO MASAHIRO (JP)
KABASAWA HIDETOSHI (JP)

PCT/JP2013/002515

November 21, 2013

April 12, 2013

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SONY CORP (JP)

G02B13/00; G02B3/00; G02B13/14

WO2000052511A1

2000-09-08

JPH08286133A	1996-11-01
JP2004258310A	2004-09-16
JP2011158665A	2011-08-18
JP2010526318A	2010-07-29
JP2010526318A	2010-07-29
JP2011082324A	2011-04-21
JP2010527565A	2010-08-12
JP2008507733A	2008-03-13

OMORI, JUNICHI (JP)
Omori Junichi (JP)

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