| US 7,459,674 B2 | ||
| Optical tweezers | ||
| Norihiro Fukuchi, Hamamatsu (Japan); and Yasunori Igasaki, Hamamatsu (Japan) | ||
| Assigned to Hamamatsu Photonics K.K., Hamamatsu-shi, Shizuoka (Japan) | ||
| Filed on Oct. 18, 2006, as Appl. No. 11/582,550. | ||
| Claims priority of application No. P2005-304719 (JP), filed on Oct. 19, 2005. | ||
| Prior Publication US 2007/0114371 A1, May 24, 2007 | ||
| Int. Cl. H01S 1/00 (2006.01); H01S 3/00 (2006.01); H05H 3/02 (2006.01) | ||
| U.S. Cl. 250—251 [250/306; 250/201.3; 355/67; 354/15; 354/614; 354/566; 354/434; 354/601; 354/1; 354/11; 354/16; 354/279; 354/290; 354/292; 235/454; 235/455; 702/19; 703/5] | 7 Claims |
| 1. Optical tweezers capable of forming an optical trap for trapping an object in each of plural trapping positions and the
vicinity thereof by converging plural output beams in each of said trapping positions, comprising:
light emitting means for outputting a reading light;
phase pattern generating means for generating an output phase pattern by arranging plural partial phase patterns two-dimensionally
after preparing said plural partial phase patterns divided into groups such that at least one of said partial phase patterns
corresponds to each of said plural trapping positions, each of said partial phase patterns causing an output beam to converge
in a corresponding trapping position; and
a spatial light modulator for generating said plural output beams, each of which has been phase-modulated in accordance with
said output phase pattern, from said reading light which reaches said spatial light modulator,
wherein said phase pattern generating means generate said output phase pattern where said plural partial phase patterns are
two-dimensionally arranged such that one partial phase pattern belonging to a group which corresponds to one of said plural
trapping positions is apart from at least one of the other partial phase patterns belonging to said group.
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