Title:
SPECTROPHOTOMETER FOR PHOTODIODE ARRAY
Document Type and Number:
Japanese Patent JPH05256703
Kind Code:
A
Abstract:
PURPOSE:To correct the relative shifting amount between the wavelengths of a sample detector and a reference detector by calculating the shifting amount between each wavelength, and arranging a time difference between start pulse signals of the detectors. CONSTITUTION:At the adjusting time of the wavelength, the absolute shifting amount of the wavelength of each of a reference detector 7 and a sample detector 8 is stared in a reference wavelength data part 15 and a sample wavelength data part 16. A control part 17 uses the data as the basis to form the time difference corresponding to the shifting amount of the read wavelength. Supposing that the data of the data part, 15 is -1 and that of the data part 16 is +1, the relative shifting amount is 2. Since the scanning time of a photodiode array corresponds to the wavelength, when one cycle of a scanning clock signal is (t), the video signals of the detectors 7 and 8 have the same wavelengths input to a LOG converting part 13 simultaneously if a scanning start signal for the detector 8 is output 2t later after a scanning start signal for the detector 7 is output.
Inventors:
Tsuneji Tsutsuda
Kenichiro Takahashi
Takashi Hasegawa
Kenichiro Takahashi
Takashi Hasegawa
Application Number:
JP5778692A
Publication Date:
October 05, 1993
Filing Date:
March 16, 1992
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
G01J3/36; (IPC1-7): G01J3/36
Attorney, Agent or Firm:
Ogawa Katsuo