Illumination optical system

Details Illumination optical system Illumination optical system

1985-12-19

1988-01-05

Corbin, John K.

Illumination

Supported by vehicle structure

Condition responsive

362268, G02B 2700, G02B 2730

Patent

active

047172428

ABSTRACT:
An illumination optical system having a light source for supplying a light beam to illuminate an object and a collimator lens system for collimating the light beam emitted from the light source, the collimator lens system being arranged such that, even if any ghost beam is produced from a lens surface of the collimator lens system, the intensity of the ghost beam per unit area on the object is suppressed to such degree that does not cause deterioration of resolution. For this purpose, in an embodiment of the invention, the lens surface of the collimator lens system is shaped in a specific manner so as to control the position at which the ghost beam is concentrated or to be concentrated.

REFERENCES:
patent: 3296923 (1967-01-01), Miles
patent: 4497013 (1985-01-01), Ohta

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