Variable magnification optical system and image pickup apparatus

Details Variable magnification optical system and image pickup apparatus Variable magnification optical system and image pickup apparatus

1997-07-15

2000-12-19

Nguyen, Thong

Optical: systems and elements

Compound lens system

With curved reflective imaging element

359432, 359433, 359435, 359731, G02B 2700, G02B 2306

Patent

active

06163400&

ABSTRACT:
A variable magnification optical system comprising four optical units each having a reflecting surface inclined with respect to a reference axis ray which is a ray passing from an aperture center of an aperture stop to a center of a final image plane, the variable magnification optical system being arranged to perform a magnification varying operation by moving at least two of the four optical units along the reference axis ray in such a manner as to vary an optical path length which extends along the reference axis ray from a predetermined position on an object side to the final image plane.

REFERENCES:
patent: 3674334 (1972-07-01), Offner
patent: 4192573 (1980-03-01), Brown, Jr.
patent: 4265510 (1981-05-01), Cook
patent: 4477156 (1984-10-01), Gebelein et al.
patent: 4571036 (1986-02-01), Gebelein et al.
patent: 4737021 (1988-04-01), Korsch
patent: 4775217 (1988-10-01), Ellis
patent: 4812028 (1989-03-01), Matsumoto
patent: 4812030 (1989-03-01), Pinson
patent: 4993818 (1991-02-01), Cook
patent: 5063586 (1991-11-01), Jewell et al.
patent: 5144476 (1992-09-01), Kebo
patent: 5638219 (1997-06-01), Medina Puerta et al.
W.E. Woehl, "An All-Reflective Zoom Optical System for the Infrared," Optical Engineering, vol. 20, No. 3, Jun. 1981, pp. 450-459.
K. Tanaka, "A Novel Configuration of Zoom Lens," OPTIK, vol. 73, No. 4, Jul. 1986, pp. 157-159.
H. P. Brueggemann, "Linear Reverting Lens With Uniform Illumination," Xerox Disclosure Journal, vol. 11, No. 3, Jun. 1986, pp. 111-113.

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