PHILIP LAM, D.O.
Psychiatric in Tucson, AZ

6598429, Jul 29, 2003

Nov 17, 2000

09/716570

Shibin Jiang - Tucson AZ
Philip Lam - Tucson AZ

BeamTek, Inc. - Tucson AZ

C03B 23057

65412, 65 301, 65 3013, 65 38, 65 56, 65 37

A method for fabricating gradient-index rods and rod arrays. A central rod of optical glass having predetermined properties and predetermined outside dimensions is placed inside a tube of optical glass having predetermined properties and predetermined outside dimensions, to form an assembly. The inside dimensions of the tube are substantially equal to the outside dimensions of the rod. The tube is formed of a plurality of coaxial sleeves, the outside dimensions of each interior sleeve being substantially equal to the inside dimensions of the next adjacent sleeve, each sleeve having a selected refractive index so that, together with the tube, the refractive indices from the central rod through the outermost sleeve approximate the refractive index profile of the gradient-index rod to be fabricated. The central rod and sleeve material is selected so that their respective thermal indices of expansion are substantially equal. The central rod and tube assembly is placed in a mold having inside dimensions substantially equal to the outside dimensions of the tube.

5933234, Aug 3, 1999

Aug 11, 1998

9/132244

Philip Lam - Tucson AZ

G01J 342

356319

A multiple optical head interferometer comprises one Light Source-Detection-Computing unit and multiple optical heads. The diameters of all of the optical heads are of equal size, and oriented in the same direction. Shutters or adjustable mirrors are provided such that the Light Source-Detection-Computing unit is used with only one optical head at a time. The multiple optical head interferometer of the present invention may measure many workpieces quickly in a short time, as while one workpiece is being measured, others may be setup for measurement or removed for further processing. In a first embodiment, the branching device for branching the laser beam comprises a plurality of beam splitters. Shutters are used to control which optical head is to be used with the Light Source-Detection-Computing unit at a particular time. In the second and preferred embodiment of the present invention, branching out of the optical heads is achieved by using adjustable mirrors and reflection.