Illumination – Light source and modifier – Plural serial lens elements or components
Patent
1995-09-29
1996-12-03
Cromada, Denise L.
Illumination
Light source and modifier
Plural serial lens elements or components
362283, 362322, F21V 2900
Patent
active
055801625
ABSTRACT:
A lighting device for an observation/image pickup apparatus capable of satisfactorily illuminating a surface of an observed section of a specimen sample for observation irrespective of whether a fine roughness is provided on the specimen surface. Illumination control slit members for laterally projected light, deflected oblique light, vertically projected light, and light composed of laterally projected light and vertically projected light, are provided, and selectively face an illumination light introducing section, to thereby convert illumination light (introduced through the illumination light introducing section) into any desired one of: laterally projected light, deflected oblique light, vertically projected light, and light composed of laterally projected light and vertically projected light, resulting in a surface of an observed section of a specimen sample being illuminated with the converted light.
REFERENCES:
patent: 2097762 (1937-11-01), Heine
patent: 4585315 (1986-04-01), Sincerbox et al.
patent: 4705366 (1987-11-01), Kimura et al.
patent: 5220453 (1993-06-01), McKinley et al.
patent: 5351169 (1994-09-01), Ishikawa et al.
Basichas Alfred
Cromada Denise L.
Mitsubishi Chemical Corporation
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