Optical system for monitor cameras to be mounted on vehicles
First Claim
Patent Images
1. An optical system for a motor vehicle comprising:
- a support adapted to be mounted on a motor vehicle;
a camera body constructed and arranged to be mounted on said support;
a photographic lens system disposed in said camera body, said photographic lens system including a first lens assembly disposed on the object side of the lens system and having a negative refractive power, and a second lens assembly disposed on the image side of said lens system and having a positive refractive power,an image pickup device disposed in said camera body and having a light receiving surface arranged to be disposed substantially parallel with respect to a surface on which the vehicle rests when the support is mounted on said vehicle; and
a reflecting member disposed in said optical system and operable to deflect a visual field toward said light receiving surface of said image pickup device;
said photographic lens system satisfying the following condition (1);
space="preserve" listing-type="equation">0.6<
f/D<
1.2 (1)wherein the reference symbol f represents a focal length of said photographic lens system and the reference symbol D represents a diagonal length of a picture plane of said image pickup device.
1 Assignment
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Accused Products
Abstract
An optical system for monitor cameras to be mounted on vehicles comprising a camera body disposed so as to be accommodatable into a support erected on a vehicle, a photographic lens system disposed in the camera body, an image pickup device having a light receiving surface which is disposed at an imaging location of the photographic lens system and directed perpendicularly to a longitudinal direction of the support, and a prism for changing a direction toward a visual field which functions to image a visual field in a horizontal direction onto the light receiving surface of the image pickup device.
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Citations
14 Claims
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1. An optical system for a motor vehicle comprising:
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a support adapted to be mounted on a motor vehicle; a camera body constructed and arranged to be mounted on said support; a photographic lens system disposed in said camera body, said photographic lens system including a first lens assembly disposed on the object side of the lens system and having a negative refractive power, and a second lens assembly disposed on the image side of said lens system and having a positive refractive power, an image pickup device disposed in said camera body and having a light receiving surface arranged to be disposed substantially parallel with respect to a surface on which the vehicle rests when the support is mounted on said vehicle; and a reflecting member disposed in said optical system and operable to deflect a visual field toward said light receiving surface of said image pickup device;
said photographic lens system satisfying the following condition (1);
space="preserve" listing-type="equation">0.6<
f/D<
1.2 (1)wherein the reference symbol f represents a focal length of said photographic lens system and the reference symbol D represents a diagonal length of a picture plane of said image pickup device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification