Robert Allen Crossland

US Patent:

46218882, Nov 11, 1986

Filed:

Mar 10, 1983

Appl. No.:

6/473891

Inventors:

Robert E. Crossland - Plano TX
Erwin E. Cooper - Carrollton TX

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

G02B 1314

US Classification:

350 12

Abstract:

A coaxial wideband refractive optical system is disclosed which permits the use of high resolution optical sensors and transmitters in the visible energy wavelengths centered at 0. 5 microns to the 12 microns wavelength in the infrared energy band. The system includes a front objective lens of wideband transmitting material such as, for example, ZnS, ZnSe, GaAs, TI-1173 glass or Ge followed by a beamsplitter and two doublet lenses. The front objective lens, which may be a positive lens, can have large color dispersion characteristics (aberrations) not normally associated with front lenses. A front, solid wideband objective lens is provided for receiving incoming electromagnetic energy radiating at about 0. 5 micron to about 12 microns wavelength in the infrared for reducing the size of the beam diameter; thus, the size of the beamsplitter and the elements of the infrared and visible optical paths formed by the beam splitter may be reduced. Each optical path formed by the beamsplitter includes one of the two lens doublets, each of which includes a negative lens of material like that of the front lens for correcting color aberrations and a positive lens which coacts with the remaining optical elements of the optical paths for correcting spherical aberrations introduced by the doublet's negative lens.

Address:

8362 Robertson Dr, Frisco, TX 75034

VIN:

WBANE53577CW59355

Make:

BMW

Model:

5 SE

Year:

2007