OPTICAL WAVELENGTH MULTIPLEX MEMORY

PURPOSE:To reduce the accuracy of the absolute wavelength of a light source by giving the wavelength scan to the stored spectrum at a fixed speed and performing the recording/reproducing jobs with a hole written previously defined as a starting point. CONSTITUTION:The light given from a light source...

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Bibliographic Details
Main Authors TADOKORO MICHIHIRO, IMAI HITOSHI, OKADA KAZUO
Format Patent
LanguageEnglish
Published 26.10.1988
Subjects
COLOUR PRINTING
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
LINING MACHINES
PERFORMING OPERATIONS
PHYSICS
PRINTING
PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES
STAMPS
TRANSPORTING
TYPEWRITERS
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Summary:PURPOSE:To reduce the accuracy of the absolute wavelength of a light source by giving the wavelength scan to the stored spectrum at a fixed speed and performing the recording/reproducing jobs with a hole written previously defined as a starting point. CONSTITUTION:The light given from a light source 10 is made incident on the selected one of optional memory elements 16 set on a medium 15 via a collimator lens 12, a light intensity control element 18, a light deflector 13 and an objective lens 14. The light transmitted through the element 16 is detected by a photodetector 17. When the wavelength is scanned by a wavelength controller 11 for recording, the wavelength has a linear change within a scan time. Then, a time series signal is obtained by the photodetector 17 because a discriminating hole is recorded to each element 16 at the head part of the waveform scan. The pulse of the discriminating hole is supplied to a synchronizing signal generating circuit 20 and a synchronizing signal of a cycle T is produced. This signal is supplied to a recording control circuit 22 and the element 18 is opened synchronously with the synchronizing signal for execution of recording (formation of a hole).
Bibliography:Application Number: JP19870093770