Reflector with curved dual involute surfaces

Details Reflector with curved dual involute surfaces Reflector with curved dual involute surfaces

1988-03-21

1989-06-27

Ostrager, Allen M.

Illumination

Photographic lighting

Including specific light modifier

362297, 362346, G03B 1502

Patent

active

048435210

ABSTRACT:
A wide angle flash tube reflector has dual involute surfaces thereon intersecting at a cusp and bent in the horizontal to intercept light from a light source adjacent the cusp and to reflect such light in a dispersion pattern that spreads the flash coverage to match extended light coverages of lenses from a normal focal length to extreme wide angle. One light source is in the form of a bent tube having adjustable positioned cathode and anode electrodes for varying the length of a plasma arc to control the extent of the dispersion pattern reflected from the dual involute surfaces.

REFERENCES:
patent: 3737226 (1973-06-01), Shank
patent: 4514793 (1985-04-01), Andreasen

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