Electricity: motive power systems – Automatic and/or with time-delay means – Movement – position – or limit-of-travel
Reexamination Certificate
2007-08-07
2007-08-07
Donovan, Lincoln (Department: 2837)
Electricity: motive power systems
Automatic and/or with time-delay means
Movement, position, or limit-of-travel
C318S560000, C318S685000, C318S696000, C396S244000, C396S256000, C396S259000, C396S458000, C396S459000, C396S493000
Reexamination Certificate
active
10983441
ABSTRACT:
A highly versatile optical shutter for industrial and scientific applications is disclosed. The has a aperture which defines a light path through the shutter, and a shutter vane or blade that is moved into and out of the light path using a precision, microprocessor controlled motor, such as a stepping motor. Preferably, the motor is mounted on the shutter housing using a shock absorbing material. A control unit associated with the shutter comprises the microprocessor, a motor driver, preferably one which is capable of microstepping the motor, and a non-volatile memory device, such as EEPROM, which stores a plurality of shutter control programs defining different trajectories of the shutter vane. Different programs may be used, for example, to maximize shutter speed or frequency, or to minimize vibrations.
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“Electronic Shutters,” Melles Griot, rendered in pdf Apr. 21, 2003 by Ester Cochran, copyright Apr. 2003, www.mellesgriot.com.
Patent Search, Nerac, Inc., Nov. 1, 2004.
Belgum Jack
Flaming Dale
Wang Ximin
Donovan Lincoln
Horn Robert W.
Sheppard Mullin Richter & Hampton LLP
Sutter Instrument Company
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