Projection lens assembly

Details Projection lens assembly Projection lens assembly

1980-03-24

1983-06-14

Corbin, John K.

350247, G02B 702, G02B 964

Patent

active

043879705

ABSTRACT:
A projection lens assembly is provided for use in a printed circuit board projection imaging system wherein a reduced image on a glass master is magnified and projected onto a photoresist coated circuit board positioned at a remote location by the assembly. The projection lens comprises eight elements having lens parameters such that the position of a hole in the glass master is projected over the entire 24.times.18 inch format of the PCB panel with minimum distortion and high optical resolution.
An adjustment technique may be provided to permit adjustment of the distortion of the assembled lens without affecting the other performance parameters of the lens.

REFERENCES:
patent: 3359849 (1967-12-01), Friedman
patent: 3583790 (1971-06-01), Baker
patent: 3617116 (1971-11-01), Jones
patent: 3733115 (1973-05-01), Cox
patent: 3874771 (1975-04-01), Behrans et al.
patent: 4149774 (1979-04-01), Hirano et al.
Harrison, R. W., "Beam Director with Independant Adjustments," IBM Technical Disclosure Bulletin, vol. 14, No. 12, pp. 3815-3816, May 1972.

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