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1. 发明专利

JPH05302854A 失效
公开(公告)号：JPH05302854A
公开(公告)日：1993-11-16
申请号：JP5989891
申请日：1991-03-25
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： OKUBO KAZUAKI , SUZUKI KENICHI , ONO YOSHIHIRO , NAKAGAWA YASUO
IPC分类号： G01J3/02 , G01J3/443
摘要： PURPOSE:To realize an optical system for introducing light to a spectroscope wherein lighting conditions for a dispersive element are not changed even if the light distribution, the size and the wavelength of a light source are changed by arranging a diffusing plate, a concave mirror, a spectroscope and an incident slit at the specified positions with respect to the light from the light source. CONSTITUTION:The light from a light source 1 is cast on a diffusing plate 2 having the semi-diffusing reflection characteristic at an incident angle alpha. A concave mirror 3 is arranged on the light path having the optical-axis angle phi=-alpha+ or -(alpha/2) with respect to the regular-reflection optical axis for the incident light to the plate 2. The reflected light is guided into an incident slit 5 of a spectroscope 4. At this time, the distance between the light source 1 and the diffusing plate 2 and the positions and the sizes of the diffusing plate and the concave mirror 3 are determined based on the size of the light source 1 so that the reflected light component enters into the range of the field-of-view angle of the incident slit 5 of the spectroscope 4. Thus, the optical system for the spectroscope 4, which guides the light into the incident slit 5 of the spectroscope 4, is formed. In this way, the optical system, where in the lighting conditions on a dispersive element are not changed even if the light distribution and the size of the light source 1 are changed in space and the wavelength is changed in anyway, is obtained.

2. 发明专利

JPH04319632A ERROR SELF-CORRECTING TYPE COLORIMETER 失效
公开(公告)号：JPH04319632A
公开(公告)日：1992-11-10
申请号：JP8818891
申请日：1991-04-19
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： ONO YOSHIHIRO , OTSUKA RIE
IPC分类号： G01J3/50
摘要： PURPOSE:To obtain a colorimeter wherein an error caused by deviation of spectral responsivity from color matching functions is subjected to self-correction, by a method wherein the mixture ratio of red, green and blue of a light to be measured is calculated and the spectral distribution of the light is synthesized on the basis of the mixture ratio and data on the spectral distribution of a representative color light. CONSTITUTION:A light 1 to be measured is a mixture light obtained by mixing lights of the three primary colors, red, green and blue, in an arbitrary ratio. A representative color light 2 is a color light of each color which is determined as the representative of an emission of each of the three primary colors, red, green and blue. A light-sensing unit 3 is composed of three light-sensing elements having spectral responsivity being approximate to color matching functions. It senses the color light from the light 1 to be measured or the representative color light 2, subjects it to photo-electric conversion, subjects an output signal of each light-sensing element to digital conversion and outputs it. The mixture ratio of the color lights constituting the light 1 to be measured can be determined from a measured value of chromaticity of the light 1 obtained by mixing red, green and blue arbitrarily and from measured values of tristimulus values of a source of the representative color light, by solving prescribed simultaneous equations, and the chromaticity of the light 1 to be measured is determined by synthesizing the spectral distribution of the light 1 to be measured on the basis of that mixture ratio and the data on the spectral distribution of the representative color light 2.

3. 发明专利

JPH03165238A GONIOPHOTOMETER 失效
公开(公告)号：JPH03165238A
公开(公告)日：1991-07-17
申请号：JP30545289
申请日：1989-11-24
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： SUZUKI KENICHI , ONO YOSHIHIRO
IPC分类号： G01N21/57
摘要： PURPOSE:To estimate the value within a dead angle with good accuracy by comparing the measured value in the specular reflecting direction not contained in the dead angle near the reflecting angle of an estimation point and the esti mated value by interpolation if the estimation point is in the specular direction with respect to the incident direction of incident light and setting a large value as the estimated value. CONSTITUTION:The luminance or luminous intensity L (theta) of the reflected light in the same direction as the direction of the incident light when the incident angle is theta is designated as equation L(theta)=L1(theta)(thetanot equal to 0 deg.)=MAX[L1(theta), L2(theta)] (theta=0 deg.), where L1(theta)=f(L(theta1), L(theta2),...L(thetan))(n>2), and L2(theta)=L(theta'). In the equation, MAX[L1(theta), L2(theta)] denotes the function taking the larger value of L1(theta) and L2(theta);theta1, theta2..., thetan(n>2) are the angles of the reflected light near theta; f[L(theta1), L(theta2)],..., L(thetan)] denotes the function to calculate the value at theta by the numberical interpolation from the luminance or luminous intensities L(theta1), L(theta2),..., L(thetan) of the reflected light at theta1, theta2..., thetan; theta' denotes the angle of the specularly reflected light near theta. The angle within the dead angle of the goniophotometer is estimated with the good accuracy in this way and the data within the dead angle which is heretofore not measurable is easily obtd.

4. 发明专利

JPH03110428A ILLUMINATION STANDARD SETTING DEVICE 失效
公开(公告)号：JPH03110428A
公开(公告)日：1991-05-10
申请号：JP24953689
申请日：1989-09-26
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： OTSUKA RIE , ONO YOSHIHIRO
IPC分类号： G01J1/08 , G01J3/10 , H05B37/02 , H05B41/39
摘要： PURPOSE:To calibrate a lighting measuring instrument by directly using the light of an electric discharge lamp by integrating and comparing the output of a standard photodetector which is given a response extent corresponding to the illuminance of the electric discharge lamp with the output of a reference voltage source and controlling the illuminance of the electric discharge lamp. CONSTITUTION:The light of the electric discharge lamp 1 is made incident on the standard photodetector 2, whose output has a ripple removed by an integration circuit 3 and is sent to an analog comparator 5. The comparator 5 compares the output of the circuit 3 with the output of the standard voltage source 4 and outputs a digital signal '1' or '0' according to whether the output of the circuit 3 is larger or smaller. The integration circuit 6 integrates and smoothes the digital signal and inputs the result to a dimming device 7 to form a feedback loop. Consequently, the output of the photodetector 2 is held equal to the set value of the voltage source 4. Therefore, the lighting measuring instrument can be calibrated by directly using the light of the electric discharge lamp and its measurement error is reduced.

5. 发明专利

JPH0240514A LUMINANCE METER FOR ROAD SURFACE 失效
公开(公告)号：JPH0240514A
公开(公告)日：1990-02-09
申请号：JP19253088
申请日：1988-08-01
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： ONO YOSHIHIRO , OSAKI YOSHIHARU
IPC分类号： G01J1/42
摘要： PURPOSE:To measure luminance down to a low luminance level highly accurately by setting the focal distance of an objective lens and the attaching angle of an aperture mirror with respect to the optical axis of the objective lens so as to satisfy the relationship expressed by a specified expression. CONSTITUTION:An objective lens 1 receives incident light from a field of view. The focal distance of the lens 1 is (f). A perforated mirror 2 is located at the rear side of the objective lens 1 and limits the measuring field of view. The mirror is attached at a slant angle theta from a vertical line with respect to the optical axis of the objective lens 1. A photodetector 3 is located at the rear side of the mirror 2. The photodetector 3 receives penetrating luminous flux and performs optoelectronic transducing action. With respect to a distance (a) from the objective lens 1 to the front end of a road surface in the measuring field of view, a distance (b) from the objective lens 1 to the rear end of the road surface in the measuring field of view and a height (h) of an image in the measuring field of view formed at the focal plane of the objective lens 1; the angle theta and the focal distance (f) are set so as to satisfy the relationship expressed by the Expression I or the Expression II.

6. 发明专利

JPH01201123A METHOD AND DEVICE FOR IRRADIATION INTENSITY OF BACTERICIDAL RAYS 失效
公开(公告)号：JPH01201123A
公开(公告)日：1989-08-14
申请号：JP2610488
申请日：1988-02-05
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： OKUBO KAZUAKI , ONO YOSHIHIRO
IPC分类号： A61L2/10 , G01J1/00 , G01J1/02 , G01J1/42
摘要： PURPOSE:To obtain the absolute value of radiation intensity with sufficiently high accuracy and to obtain a stable measured value of the bactericidal rays irradiation intensity by giving a silicon photodiode an absolute response with 253.7nm wavelength by a self-calibrating method. CONSTITUTION:As for the p-n junction silicon diode, the losses of the border surface between the surfaces of SiO2 and Si, recoupling in a p area, and recoupling in an n area are considered principally to cause a decrease in quantum efficiency, which is measured to perform the self-calibration of the absolute response of the silicon photodiode. In a figure showing an optical system where a single bright line radiation source of 253.7nm in wavelength is calibrated reversely, a bactericidal lamp 1 and a 1st interference filter 2 which has a transmission band nearby the 253.7nm wavelength are combined to form a single bright line radiation source of 253.7nm wavelength and a bactericidal-ray radiation illumination meter where a 2nd interference filter 5 is inserted is placed between the area of the silicon photodiode 3 whose absolute response is found and a fine aperture 4 to obtain the absolute response.

7. 发明专利

JPS63127127A LIGHT POWER MEASURING DEVICE 失效
公开(公告)号：JPS63127127A
公开(公告)日：1988-05-31
申请号：JP27327586
申请日：1986-11-17
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： ONO YOSHIHIRO , NISHIYAMA HIDEO
IPC分类号： G01J1/42
摘要： PURPOSE:To measure the light power of laser at a low power level with high accuracy without using an auxiliary wavelength measuring means, by using a specific formula on the basis of the respective output signals of two light receivers. CONSTITUTION:A part of the light emitted from a light source 1 to be measured passes through an aperture 2 at first and impinges against a pervious diffusion plate 3 to be diffused. A part of the diffused light passes through a glass filter 4 to reach a silicon photodiode 6 and the other part of the diffused light passes through a glass filter 5 to reach a silicon photodiode 7. The photocurrents generated in the photodiodes 6, 7 are amplified by operational amplifiers 9, 10. Next, a microcomputer 13 controls an analogue switch 11 and an A/D converter 12 to calculate the output signal Sa of a light receiver 6 of which the absolute spectral sensitivity Ra(lambda) is shown by a formula Ra(lambda)=alambda+b and the output signal Sb of a light receiver 7 of which the absolute spectral sensitivity Rb(lambda) is shown by a formula Rb(lambda)=clambda+d and, from the respective signals Sa, Sb, the sum total of incident powers can be calculated. In the formulae, a-d are coefficient.

8. 发明专利

JPH05118919A AUTOMATIC ILLUMINANCE SETTING APPARATUS 失效
公开(公告)号：JPH05118919A
公开(公告)日：1993-05-14
申请号：JP27814191
申请日：1991-10-25
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： ONO YOSHIHIRO , NISHIYAMA HIDEO
IPC分类号： G01J1/02 , G01J1/26
摘要： PURPOSE:To make it possible to set precise illuminance automatically in a wide range of illuminance level and make efficient correcting work of an optical measuring instrument such as an illuminometer, etc. CONSTITUTION:A light receiver sliding apparatus 15 is so set as to position a standard light receiver 13 on an optical axis B and light emitted from a diffusion bulb-type electric bulb 11 is received by the standard light receiver 13. The output of the standard light receiver 13 is put in a controlling part 6a and converted into a measured illuminance value. Meanwhile, a set illuminance value to be set at is previously put in an input part 17a. In the controlling part 16a, automatic adjustment of the slit width of a changeable slit 12 is repeated until the measured illuminance value from the standard light receiver 13 becomes equal to the set illuminance value. After a fixed time, the set illuminance value is obtained at the position of the standard light receiver 13. Then, using a light receiver sliding apparatus 15, an illuminometer 14, an object for correction, is shifted to the optical axis B and the read value of the illuminometer 14 to be corrected is recorded and if necessary the sensitivity of the illuminometer 14 to be corrected is so adjusted as to make the indication of the illuminometer 14 to be corrected agree with the set illuminance value.

9. 发明专利

JPH04204218A METHOD FOR MEASURING SPECTRAL RESPONSE OF SPHERICAL INTEGRATING PHOTOMETER 失效
公开(公告)号：JPH04204218A
公开(公告)日：1992-07-24
申请号：JP33805590
申请日：1990-11-30
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： SUZUKI KENICHI , ONO YOSHIHIRO
IPC分类号： G01J1/00 , G01J1/02 , G01J3/28
摘要： PURPOSE:To simply and accurately calculate the relative spectral response of a spherical integrating photometer by setting up simultaneous equations from the relation between the spectral distribution of the light generated in the spherical integrating photometer to be diffused and the output of a photodetector to solve the same. CONSTITUTION:An optical color changeable light source 3 lights by an optical color changeable control apparatus 4 and light whose spectral distribution becomes Pj (j=1,..., n) is generated in an integrating sphere 1. At this time, the light diffused by the integrating sphere 1 is incident to a photodetector 2 and, as a result, the output I calculated from I=k.Pj.Qj.Dj... (formula 7) of the photodetector 2 is obtained. If Pj is preliminarily calculated, when above mentioned operation is repeated by the number of times corresponding to the number (n) of the wavelength bands of spectral response to be calculated, (n) element simultaneous simple equations being I1=k.SIGMA {Qj.Pij.Dj}...1 can be set up and, by solving these equations by an operator 5, the relative spectral response Dj of the photodetector 2 can be obtained. The relative spectral response Rj of a spherical integrating photometer can be calculated from Dj by the operator 5.

10. 发明专利

JPH03295423A LIGHT SHIELD CYLINDER TYPE LUMINANCE METER 失效
公开(公告)号：JPH03295423A
公开(公告)日：1991-12-26
申请号：JP9797590
申请日：1990-04-13
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： OTSUKA RIE , ONO YOSHIHIRO
IPC分类号： G01J1/02
摘要： PURPOSE:To measure illuminance and luminance by the same lighting measuring equipment by combining a light shield cylinder and an illumination meter whose aperture diameters and lengths are related by a specific expression. CONSTITUTION:Denoting the luminance of a surface 3 to be measured as L(cd/m ) when the light shield cylinder 2 fitted on the front surface of the illumination meter 1 contacts the surface 3, the illuminance value E(lx) of the photodetection surface 4 of the illumination meter 1 is represented as E=piaL (a +b ). Then L=E needs to hold so as to display the luminance L correctly on the display part of the illumination meter 1. Consequently, the aperture diameter and length (b) of the light shield cylinder 2 are so related that a (pi-1)=b , and the light shield cylinder is designed according to said equation, so that the luminance value L of the measured surface 3 can correctly be displayed on the display part of the illumination meter 1. When the indication value of the illumination meter is calibrated, the correct luminance value can be displayed without any calibration for a luminance meter.

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