Inventor

SCHWENKER JOHN P

US2 patents

Patents

2 patents

US5384656AJan 24, 1995

Astigmatism corrected gratings for plane grating and spherical mirror spectrographs

HYPERFINE INC23 citations85

US5066127ANov 19, 1991

Stigmatic imaging with spherical concave diffraction gratings

HYPERFINE INC19 citations66