Viscous supercooled liquid lens elements having abnormal dispers

Details Viscous supercooled liquid lens elements having abnormal dispers Viscous supercooled liquid lens elements having abnormal dispers

1993-01-28

1994-09-06

Look, Edward L.

Optical: systems and elements

Lens

Fluid

359796, G02B 312, G02B 106

Patent

active

053453379

ABSTRACT:
Optimized design forms are provided for glass-liquid lens triplets for use as telescope objectives having reduced secondary spectrum. Each lens triplet comprises an abnormal-dispersion liquid lens element contained between two normal-dispersion glass lens elements. The glass lens elements are made of readily available and relatively inexpensive optical glasses. The liquid lens element in each lens triplet consists of a commercially available viscous supercooled liquid of abnormal dispersion, which is transparent to optical radiation at visible wavelengths without freezing at temperatures in a range from about -50.degree. C. to about 50.degree. C.

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patent: 5033831 (1991-07-01), Sigler

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