David Eric Carpenter
Accountancy in Boulder, CO
License number
Colorado 6050
Issued Date
Jan 29, 1981
Renew Date
Jun 1, 2002
Expiration Date
May 31, 2004
Type
Certified Public Accountant
Address
Address
Box 1577, Boulder, CO 80306
Professional information
Liquid Prism Device
US Patent:
4953956, Sep 4, 1990
Filed:
Jun 10, 1988
Appl. No.:
7/205367
Inventors:
David J. Carpenter - Boulder CO
International Classification:
G02B 314, G02B 504
US Classification:
350419
Abstract:
An optical device including a fluid filled prism that has flexible side wall portions to provide a variable lens system in conjunction with the prism. The device has translucent side walls formed in a trough shape with an open top side for conveniently changing the fluid in the prism body and thoroughly cleaning the interior side walls of the prism. The side walls of the prism are flexible through a range of spacings to provide a lens effect variation from concave to convex.