Title:
光センサ
Document Type and Number:
Japanese Patent JP4080593
Kind Code:
B2
Abstract:
A first Peltier device Pe1 and at least one second Peltier device Pe2 having a current consumption smaller than that of the first Peltier device Pe1 are connected to each other in series, while a bypass circuit B for diverting an excess current I3 with respect to the second Peltier device Pe2 is connected to the second Peltier device Pe2 in parallel, so that a driving current I1 from a current control section A drives the first Peltier device Pe1 at its optimum operating point, and the excess current I3 with respect to the second Peltier device Pe2 in the driving current I1 is diverted into the bypass circuit B, so as to allow the second Peltier device Pe2 to be driven at its optimum operating point as well, where by the cooling efficiency can be improved. Also, the first and second Peltier devices Pe1, Pe2 are stacked on each other, while all the Peltier devices Pe1, Pe2 are driven by the single common current control section A, so as to attain a smaller size.
Inventors:
Satoru Muramatsu
Suzuki Shutaku
Suzuki Shutaku
Application Number:
JP12761198A
Publication Date:
April 23, 2008
Filing Date:
May 11, 1998
Export Citation:
Assignee:
Hamamatsu Photonics Co., Ltd.
International Classes:
G01J5/02; G01J5/06; H01J7/24; H01L23/38; H01L27/14; H01L31/02; H01L31/024; H01L35/28; H01L35/32; H04N5/33; F25B21/02
Domestic Patent References:
| JP1079532A | ||||
| JP8501658A | ||||
| JP8247840A | ||||
| JP7246310A | ||||
| JP9213850A |
Attorney, Agent or Firm:
Yoshiki Hasegawa
Shiro Terasaki
Satoru Ishida
Shiro Terasaki
Satoru Ishida