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US 2002/0153473 A1Published application
Optical sensor
AssigneeOlympus Optical Co., Ltd.
InventorShunsuke Kurata
Life of this patent
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Abstract
An optical sensor according to the present invention includes an LED, a telecentric lens which collimates LED light and converts the reflected light reflected by an object, a half mirror which reflects the LED light toward the telecentric lens and allows transmission of the reflected light converged by the telecentric lens, a diaphragm, and a two-dimensional imaging element.
Claims9
An optical sensor comprising:
- an LED light source;
- an optical path-splitting element located on an axis of light emitted from the LED light source;
- an incident-light image-formation optical system located on a reflected-light optical path, which is one of optical paths of the optical path-splitting element, and collimating the light emitted from the LED light source and converting reflected light traveling from an object;
- and
- a two-dimensional imaging element located on a transmitted-light optical path, another one of the optical paths of the optical path-splitting element, and performing an image-pickup operation with respect to the reflected light guided from the object and converged by the incident-light image-formation optical system,
- wherein said optical path-splitting element is inclined at an angle of about 45° inside a cylindrical casing, said incident-light image-formation optical system and said two-dimensional imaging element are arranged in an open end of the casing and located in the vicinity of the optical path-splitting element, and said LED light source is provided on a side wall of the casing.
3 more elements
Dependencies are inferred from the claim text.