Don L King

US Patent:

43267750, Apr 27, 1982

Filed:

Jun 9, 1980

Appl. No.:

6/157865

Inventors:

Don G. King - Lewisville TX

International Classification:

G02B 510
G02B 2718

US Classification:

350320

Abstract:

A method for operating a panoramic optical system to produce a shadow or darkened zone on the apex of a curved lens in order to eliminate undesirable optical interference in the region between the curved reflector and the focal plane is disclosed. The claimed method makes possible the accurate prediction of the diameter of the darkened zone around which the reflected image is annularly disposed, for a lens having a reflective surface of a given radius of curvature and for a specific location of the transparent/opaque border relative to the top of the lens. This makes possible the calibration of vertical displacement of an opaque sleeve for quickly and easily establishing a setting which will produce a darkened zone of a standard diameter.

US Patent:

44299575, Feb 7, 1984

Filed:

Jul 30, 1981

Appl. No.:

6/288656

Inventors:

Don G. King - Lewisville TX

Assignee:

King-Bell Optics, Inc. - Lewisville TX

International Classification:

G02B 1306
G02B 1514

US Classification:

350423

Abstract:

A panoramic zoom lens assembly of the type including a reflector lens spaced from the image plane of an optical recording device such as a film camera or video camera is disclosed. The zoom lens assembly includes a cylindrical housing having a transparent sidewall portion and an opaque sidewall portion with a reflector mounted in optical communication with the transparent sidewall zone. The reflector is provided with a symmetrical, reflective surface of revolution the axis of which is transverse to the image plane. An annular, objective lens assembly is mounted within the housing in a fixed position surrounded by the opaque housing sidewall portion. An intermediate annular lens is mounted within the housing for reciprocal movement along the reflector axis between the objective lens and the image plane. Displacement of the movable annular lens varies the focal length of the overall lens assembly. In a preferred embodiment, a third annular lens is mounted in a fixed position between the movable annular lens and the image plane whereby the assembly can be mounted directly onto a camera housing.

US Patent:

43273122, Apr 27, 1982

Filed:

Jun 16, 1980

Appl. No.:

6/159613

Inventors:

Don G. King - Lewisville TX
Bill B. Bennett - Lewisville TX

International Classification:

H01J 2978

US Classification:

315378

Abstract:

A sweep generator for producing a circular raster of curved scanning lines on the target surface of a video camera is disclosed. Each curved trace follows a substantially circular path through a scanning angle of 360. degree. The circular raster is generated by horizontal and vertical scanning signals which are synchronized with the horizontal line frequency of a video receiver. The horizontal scanning signal is characterized by a constant amplitude component followed by a sine wave component, and the vertical scanning signal is characterized by a composite waveform including a constant amplitude component followed by a sine wave component which is shifted 90. degree. in phase with respect to the sine wave of the horizontal scanning signal. The constant amplitude components of each composite waveform are synchronized with the horizontal blanking pulse which occurs during horizontal retrace of the scanning beam in the receiver, and the phase shifted sine waves are synchronized with the forward trace of each horizontal line in the receiver. This produces a one-to-one correspondence of each circular trace in the video camera with each horizontal forward trace in the receiver.