Optical: systems and elements – Optical modulator – Light wave directional modulation
Patent
1991-08-14
1993-12-14
Arnold, Bruce Y.
Optical: systems and elements
Optical modulator
Light wave directional modulation
359240, 359211, G02B 2608, G02F 101, G02F 129
Patent
active
052708527
ABSTRACT:
An optical shutter-camera includes a first optical unit, a deflecting unit, and a second optical unit. The first optical unit receives image rays from a subject and outputs first optical image rays to form a first optical image of the subject. The deflecting unit includes a deflection member and a pumping unit. The deflection member is a nonlinear optical material whose refractive index is varied by beam radiation. The pumping unit radiates a pumping beam having a variable intensity to a required region of the deflection member and varies the refractive index of the required region to variably deflect optical paths of the first optical image rays. The deflection unit is positioned so that a deflection center of the optical paths of the first optical image rays, formed when the variable intensity-pumping beam in incident on the deflection member, substantially agree with a position where the first optical image is formed. The second optical unit receives the first optical image rays from the deflection unit and outputs second optical image rays to form a second optical image of the subject. The second optical unit includes an aperture. The aperture restricts one of the first optical image rays and the second optical image rays.
REFERENCES:
patent: 3372972 (1968-03-01), Schmidt et al.
patent: 3395961 (1968-08-01), Ready
patent: 4585301 (1986-04-01), Bialkowski
patent: 4880296 (1989-11-01), Ditman, Jr.
patent: 5126874 (1992-06-01), Alfano et al.
Kinoshita, "New Picosecond Electronic Framing Camera", SPIE, vol. 569 High Speed Photography, Videography, and Photonics III (1985).
Li et al., "Ultrafast all-optical deflection based on an induced area modulation in nonlinear materials", Optics Letters, No. 6, Mar. 15, 1992, pp. 438-440.
Kinoshita Katsuyuki
Tsuchiya Yutaka
Arnold Bruce Y.
Hamamatsu Photonics K.K.
Lester Evelyn A.
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