Focusing screen and method of manufacturing same

Details Focusing screen and method of manufacturing same Focusing screen and method of manufacturing same

1990-12-19

1992-06-02

Arnold, Bruce Y.

Optical: systems and elements

Single channel simultaneously to or from plural channels

By surface composed of lenticular elements

359741, 359831, 354200, G03B 300

Patent

active

051192357

ABSTRACT:
A focusing screen of the type composed of a multitude of micro-lens-like curved surfaces arranged on a given plane is substantially regular in terms of their two-dimensional arrangement on the above-mentioned plane but exhibits some variation in terms of the height of the microscopic surface roughness formed by the micro-lens-like curved surfaces. The variation range is determined in correspondence with the pitch of the above-mentioned two-dimensional arrangement. Also disclosed is a method of manufacturing a focusing screen exhibiting an appropriate degree of randomness in terms of its surface configuration.

REFERENCES:
patent: 4338012 (1982-06-01), Matsumura et al.
patent: 4352547 (1982-10-01), Sasaya
patent: 4421398 (1983-12-01), Suzuki et al.
patent: 4567123 (1986-01-01), Ohtaka et al.
patent: 4982214 (1991-01-01), Matsui

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