Claims
- 1. A spectrophotometer for measuring the light intensity of each wavelength of light received from a test piece, said spectrophotometer comprising:
- a light source for irradiating the test piece;
- first splitting means for splitting light coming from the test piece into its different wavelengths;
- a first array of light-receiving elements for receiving the wavelengths of light from said first splitting means and generating spectral light intensity values for each wavelength of light received;
- second splitting means for splitting light emitted from said light source into its different wavelength;
- a second array of light-receiving elements for receiving the wavelengths of light from said second splitting means and for generating spectral light intensity values for each wavelength of light received, wherein the pitch of the wavelengths of light to be measured by the second light-receiving element array in combination with the second splitting means is larger than that of the light to be measured by the first light-receiving element array in combination with the first splitting means;
- an analog-to-digital converter for converting the spectral light intensity values for each wavelength output from both the first and second light-receiving element arrays into digital form; and
- calculating means for calculating the ratios of the spectral light intensity values for each wavelength from the first light-receiving element array to the spectral light intensity values for each wavelength from the second light-receiving element array.
- 2. A spectrophotometer claimed in claim 1, further comprising interpolating means for calculating values of light intensity of the light source for each wavelength by the same pitch as the light from the test piece.
Priority Claims (4)
Number |
Date |
Country |
Kind |
61-129013 |
Jun 1986 |
JPX |
|
61-129014 |
Jun 1986 |
JPX |
|
61-129015 |
Jun 1986 |
JPX |
|
61-133442 |
Jun 1986 |
JPX |
|
Parent Case Info
This is a continuation of application Ser. No. 07/697,928 filed on May 2, 1991 and issued as U.S. Pat. No. 5,175,697 on Dec. 29, 1992 for A spectrophotometer for accurately measuring light intensity in a specific wavelength region which is a continuation of application Ser. No. 07/395,201 filed on Aug. 15, 1989, now abandoned, which was a continuation of application Ser. No. 07/057,517, filed on Jun. 1, 1987, now abandoned.
US Referenced Citations (7)
Foreign Referenced Citations (10)
Number |
Date |
Country |
0081702 |
Nov 1982 |
EPX |
56-79922 |
Jun 1981 |
JPX |
57-166532 |
Oct 1982 |
JPX |
59-20804 |
Feb 1984 |
JPX |
59-67429 |
Apr 1984 |
JPX |
59-206765 |
Nov 1984 |
JPX |
60-79248 |
May 1985 |
JPX |
60-113124 |
Jun 1985 |
JPX |
60-135730 |
Jul 1985 |
JPX |
2119086 |
Apr 1982 |
GBX |
Non-Patent Literature Citations (3)
Entry |
Color: Theory and Imaging Systems, Dr. Gunther Wyszechi, 1973 Society of Photographic Scientists and Engineers, Wash. D.C. pp. 24-29. |
Chroma Meter CR-100/CR-110, Operational Manual, Minolta 1984, Japan. |
Waveform Data Processing for the Scientific Measurement, Shigeo Minami, Chapter 7, issued Apr. 30, 1986; pp. 122-131. |
Continuations (3)
|
Number |
Date |
Country |
Parent |
697928 |
May 1991 |
|
Parent |
395201 |
Aug 1989 |
|
Parent |
57517 |
Jun 1987 |
|