LENS CEMERA CONE

WIPO Patent Application WO/2008/056534

A1

This invention provides a lens camera cone which can maintain good optical properties while maintaining environmental resistance. In this lens camera cone, an outer frame member is formed of “a crystalline plastic” having excellent environmental resistance. By virtue of this, even when a camera is exposed, for example, to ultraviolet light of the sun, rainfall, snowfall, and snow melting agents, in such a state that the camera is exposed outside a car, a lens part within the camera can be protected for a long period of time. On the other hand, an internal frame member is formed of “a noncrystalline (or) amorphous plastic” which has inferior environmental resisitance but has lower moisture absorption as compared with the outer frame member. Accordingly, even when the camera is used under highly humid conditions, the deformation of the internal frame member can be prevented to suppress the occurrence of a rickety state in the lens. Further, a construction may also be adopted in which the lens held in the internal frame member is formed of the same material as the internal frame member to render the coefficient of linear expansion of the lens identical to that of the internal frame member to suppress the occurrence of a rickety state in the lens.

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UMEDA HIROMU (JP)

PCT/JP2007/070610

May 15, 2008

October 23, 2007

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KONICA MINOLTA OPTO INC (JP)
UMEDA HIROMU (JP)

G02B7/02

JPH04146404A	1992-05-20
JP2003262777A	2003-09-19
JPH11218667A	1999-08-10
JP2002090603A	2002-03-27
JPS63253317A	1988-10-20
JPH0511157A	1993-01-19

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