MICHAEL JACOBSON, MD
Osteopathic Medicine at Tangerine Rd, Tucson, AZ

6870615, Mar 22, 2005

Mar 17, 2003

10/390817

Robert E. Parks - Tucson AZ, US
William P. Kuhn - Tucson AZ, US
Bryan Loucks - Los Altos Hills CA, US
Michael R. Jacobson - Tucson AZ, US

G01J003/42

356319, 356325

A modular dual-beam source, sample compartment and beam-combining system are provided when used with a monochromator and detector to form a spectrophotometer consisting of: (a) a source module where two ellipsoidal mirrors each produce an image of the light source, and (b) a reflecting sample-compartment module, wherein each side has two plane-mirrors, of the four plane mirrors, three are reference and one is the sample, or (c) a transmission sample-compartment module, wherein each side has two plane-mirrors, and a sample is placed between one pair of plane-mirrors, and (d) a beam-combining module wherein the source images are imaged by a second pair of ellipsoidal mirrors on a reflective chopper that combines the images at a single location that is imaged, external to the module, by another mirror, each module being kinematically located with respect to each other so the system remains optically aligned as modules are interchanged.