Television – Special applications – With endoscope
Patent
1994-09-08
1996-06-04
Greening, Wendy R.
Television
Special applications
With endoscope
348 68, 601109, H04N 5225
Patent
active
055237827
ABSTRACT:
The present invention is a dental video camera which includes a housing, a light source, a CCD camera, an adjustably focusing lens system and a fixed focusing lens system. The housing has an elongated cavity with a distal end and a proximal end. The CCD camera disposed in the elongated cavity of the housing at the proximal end thereof. The adjustably focusing lens system is disposed within the elongated cavity of the housing and is optically coupled to the CCD camera. The adjustably focusing lens system provides a focusing adjustment between a near field of focus and a far field of focus. The fixed focusing lens system is optically coupled to the adjustably focusing lens system and is disposed in the elongated cavity of the housing adjacent to the distal end thereof. The rotatably adjustable iris is optically and mechanically coupled to the adjustably focusing lens system. The rotatably adjustable iris provides adjustment of the opening between wide open and nearly closed in response to the focusing adjustment.
REFERENCES:
patent: 4755873 (1988-07-01), Kobayashi
patent: 4757381 (1988-07-01), Cooper et al.
patent: 4765313 (1988-08-01), Kumakura
patent: 4941457 (1990-07-01), Hasegawa
patent: 5047847 (1991-09-01), Toda et al.
Greening Wendy R.
Johansen W. Edward
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