US 7,570,848 B2
Lens adjusting method, lens adjusting device, and optical switch
Hideo Okada, Kawasaki (Japan); and Shinichi Wakana, Kawasaki (Japan)
Assigned to Fujitsu Limited, Kawasaki (Japan)
Filed on Nov. 26, 2007, as Appl. No. 11/984,991.
Claims priority of application No. 2006-328446 (JP), filed on Dec. 05, 2006.
Prior Publication US 2008/0131119 A1, Jun. 05, 2008
Int. Cl. G02B 6/35 (2006.01)
U.S. Cl. 385—19  [385/18] 10 Claims
OG exemplary drawing
 
1. A lens adjusting method for an optical switch that includes a plurality of pairs of ports and first lenses, a second lens, and an inclinable mirror, wherein diffusion light emitted from the ports are respectively collimated by the first lenses, collected into the mirror by the second lens, and reflected by the inclinable mirror to be input to one of the ports, the lens adjusting method comprising:
measuring a first position at which an optical axis of light that passes a core of the second lens is received, and a second position at which an optical axis of light that is collimated by a first lens and does not pass the core is received; and
adjusting a position of the first lens so that the second position coincides with the first position.