Exposure equipment for display tube fabrication

Details Exposure equipment for display tube fabrication Exposure equipment for display tube fabrication

1996-03-08

1998-10-13

Sugarman, Scott J.

Optical: systems and elements

Lens

Anamorphic

396546, 430 24, G02B 1308, G02B 4100, G03C 500

Patent

active

058221301

ABSTRACT:
Light radiated from a light source is gathered by an oval mirror. The gathered light is incident on one end of a rod-shaped optical integrator, integrated and made uniform within the optical integrator, and is radiated from the other end of the optical integrator. The light from the optical integrator is diffused and projected on an exposure area of a display tube by a lens system. The lens system presents an astigmatism, thereby forming a first virtual focus and a second virtual focus on its virtual image area. The diffused light is apparently diffused vertically at the first virtual focus and apparently diffused horizontally at the second virtual focus. The first vertical focus and the second vertical focus correspond respectively in position to the positions of the vertical deflection means and horizontal deflection means of the display tube. Therefore, the directions of the exposure light beams which shed light on green, blue, and red dots are in agreement with the directions of the deflected electron beams. As a result, the deflected electron beams can sweep over the green, blue, and red dots accurately in synchronization with image signals.

REFERENCES:
patent: 3504599 (1970-04-01), Barten
patent: 3587417 (1971-06-01), Balder et al.
patent: 4078239 (1978-03-01), Prazak et al.

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