公开(公告)号：GB2208001A

公开(公告)日：1989-02-15

申请号：GB8818568

申请日：1988-08-04

Applicant: MINOLTA CAMERA KK

Inventor： YAMANISHI AKIO ,  KAMEZAWA HITOSHI ,  SAKAI TAKAO ,  TSUJI SADAFUSA ,  OTA MITSUNOBU

IPC: G01N21/31 ,  G01N21/63 ,  G01N21/84 ,  G01N21/17

Abstract: An optical density detector which comprises a first light source for emitting a first light which belongs to a wavelength region in which the first light is hardly absorbed by a specific material contained in a sample, a second light source for emitting a second light which belongs to a wavelength region in which the second light is absorbed, substantially as compared with the first light, by the specific material, wherein a peak-wavelength of the second light is shifted by change of a temperature and change of an absorption of the specific material caused by the peak-wavelength shift is characteristic of a linear equation with a gentle grade, light receiving device for measuring a quantity of the first and the second lights which are transmitted through the sample, an arithmetic unit for calculating difference of absorbance between the first light and the second light of which both change depending on the density of the specific material, a temperature measuring device for measuring the temperature of the first and the second light sources and the light receiving device, or measuring the ambient temperature around the first and the second light sources and the light receiving device and compensation unit for compensating the difference of absorbance which is calculated by the arithmetic unit, with the absorption coefficient of the specific material at a shifted peak-wavelength of the second light, wherein the shifted peak-wavelength is calculated on the basis of a measured value measured by said temperature measuring device.

公开(公告)号：JPS6449935A

公开(公告)日：1989-02-27

申请号：JP20679387

申请日：1987-08-20

Applicant: MINOLTA CAMERA KK

Inventor： SAKAI TAKAO ,  YAMANISHI AKIO ,  KAMEZAWA HITOSHI

IPC: G01N21/27 ,  G01N21/31 ,  G01N21/63 ,  G01N21/84

Abstract: PURPOSE:To improve the accuracy and efficiency of measurement by performing initial calibration again when the difference between the temperature of light sources at the time of density measurement and the temperature of the light sources at the time of the initial calibration exceeds a permissible range. CONSTITUTION:When processing is set in a calibration mode, a photodetecting means 6 and a temperature measuring circuit 23 measure the quantity of light in the specific wavelength range of the light source 4 and 5 and the temperature of the light sources or their ambient temperature and store them in a storage circuit 26. Then when a density measurement mode is entered, a control arithmetic circuit 21 compares temperature measured by a temperature measuring circuit 23 with the temperature stored in the storage circuit 26 to decide whether or not the difference between both temperature values is within the permissible range predetermined according to the light emission quantity characteristics of the light sources 4 and 5. When said difference is not within the permissible range, the density measurement is quitted and the calibration measurement is performed again. When the difference is within the permissible range, the density of a specific component in a sample is calculated from the measured quantity of sample transmitted light measured and the calibrated light quantity in the storage circuit 26.

公开(公告)号：JPH04223236A

公开(公告)日：1992-08-13

申请号：JP40614090

申请日：1990-12-25

Applicant: MINOLTA CAMERA KK

Inventor： KAMEZAWA HITOSHI ,  SUGIYAMA MASAMI ,  KAWAGOE NOBUKAZU ,  KIYOI KAZUHISA ,  OSAKI SHIGERU ,  ONO TOMOMI

IPC: G01J3/50

Abstract: PURPOSE:To make it possible to discriminate between a command and display data inputted from an external apparatus and to display only the display data in a display element. CONSTITUTION:A display element, an input means for inputting a command and data for display from an external apparatus, a discriminating means for discriminating between the command and the data for display which are inputted, and a display control means for displaying the data for display in the aforesaid display element when the input is discriminated as the data for display, are provided.

公开(公告)号：JPS6449941A

公开(公告)日：1989-02-27

申请号：JP20679687

申请日：1987-08-20

Applicant: MINOLTA CAMERA KK

Inventor： SAKAI TAKAO ,  KAMEZAWA HITOSHI

IPC: G01N21/31

Abstract: PURPOSE:To easily measure the average value of measured values at plural points in a farm and the deviation from a reference value by providing a means for calculating the average value of the plural measured values obtd. by measurement and means for calculating the deviation from the reference value. CONSTITUTION:The light rays emitted from a red light emitting diode 4 and an infrared ray emitting diode 5 are projected on a sample leaf and the light rays transmitted therethrough are detected by a light receiving element 6. The concn. of the chlorophyl in the leaf is computed by an arithmetic circuit 21 in accordance with the measured quantity of the transmitted light and the plural measured values obtd. by the calculation are stored into the RAM in the arithmetic circuit 21. An average value calculation mode is set and the average value of the measured values stored in the above-mentioned RAM is calculated when the average value switch in a switch 29 is pushed. The arithmetic circuit 21 calculates the deviation between the previously inputted reference value and the measured values mentioned above when the mode is set at a deviation calculation mode. The calculated deviation is displayed by a display element 31.

公开(公告)号：JPS6363430A

公开(公告)日：1988-03-19

申请号：JP20686986

申请日：1986-09-04

Applicant: MINOLTA CAMERA KK

Inventor： KAMEZAWA HITOSHI ,  SAKAI TAKAO ,  OOTA MITSUNOBU ,  MAKINO MASAYUKI

IPC: G01N33/49 ,  A61B5/145 ,  A61B5/1455 ,  G01N33/497

公开(公告)号：JPS6362750A

公开(公告)日：1988-03-19

申请号：JP20686786

申请日：1986-09-04

Applicant: MINOLTA CAMERA KK

Inventor： KAMEZAWA HITOSHI ,  HAMAGURI KENJI

IPC: B41J2/30 ,  B41J2/355 ,  B41J2/36

Abstract: PURPOSE:To control printing density uniformly, by detecting the number of printing heads operated simultaneously corresponding to a character pattern to be printed and correcting the supply time of energy applied to the printing heads at the time of the operation of a printer in view of the variation of power source voltage at that time. CONSTITUTION:The control of printing density is performed on the basis of the time for supplying a current to a head resistor RH provided at every printing head. The printing information inputted to a control microprocessor 1 from external machinery 8 through an interface 3 is converted to an 8-dot pattern to be printed by the control microprocessor 1, and the printing head 2 corresponding to the character pattern is designated and a circuit of the head resistors RH is formed to supply a current to said head resistors RH. At this time, a current supply time is corrected so that the same quantity of energy as a reference state is supplied corresponding to the number of the printing heads simultaneously operated by the control microprocessor.

公开(公告)号：JPH02237544A

公开(公告)日：1990-09-20

申请号：JP5813689

申请日：1989-03-10

Applicant: MINOLTA CAMERA KK

Inventor： MAJIMA YUTAKA ,  KAMEZAWA HITOSHI ,  SAKAI TAKAO

IPC: G01N21/27 ,  A61B5/145 ,  A61B5/1455

Abstract: PURPOSE:To extend the life of a light source by reducing the consumption of a battery and to alleviate the pain of an examinee by stopping light emitting operation for a predetermined time when it is detected that the saturation degree of oxygen in arterial blood is unstable timewise. CONSTITUTION:When a light emitting part 2 starts light emission at predetermined frequency by the light emitting order of an operation part 7, the saturation degree of oxygen in arterial blood and a pulse rate are calculated from the signal outputted from a signal processing part 6 on the basis of the operation of a light detecting part 3 and that of a photoelectric conversion part 4 and the stabilities thereof are investigated. Next, it is judged whether the calculated saturation degree of oxygen in arterial blood and pulse rate are within set ranges and, when the measured values are within an alarm range, measurement is continued. When the measured values are judged to be stable and also judged to be not within the alarm range, an operation part 7 issues a light putting-out order to a light emission control part 5 to stop the light emission of the light emitting part 2. After a predetermined time is elapsed, the light emission of the light emitting part 2 is reopened and the same operation is repeated in the same way.

公开(公告)号：JPH02147837A

公开(公告)日：1990-06-06

申请号：JP30299688

申请日：1988-11-29

Applicant: MINOLTA CAMERA KK

Inventor： KAMEZAWA HITOSHI ,  SAKAI TAKAO

IPC: G01J3/427 ,  G01N21/27 ,  G01N21/31

Abstract: PURPOSE:To easily compare measured values of optical concentration meters with each other even when kinds of plants or measuring conditions of each meter are different from each other by providing a controlling arithmetic circuit and input device which corrects stored operation factors and offset values. CONSTITUTION:This optical concentration meter finds the concentration of a specific substance contained in a sample from the difference in absorption coefficient (difference in absorbance) between the light of a waveform band strongly absorbed by the specific substance and the light of a waveform band weakly absorbed by the substance. A controlling arithmetic circuit 21 controls each circuit and, at the same time, calculates the concentration of the substance from the difference in absorbance by using a prescribed calculation formula. An input device 10 is constituted of three switches and used for correcting operation factors and offset values as well as for switching the mode to the operation factor setting mode. Therefore, the same chlorophyll concentration can be shown even when kinds of leaves are different from each other, by, for example, correcting the concentration meter so that the same display value can be shown against the same nitrogen concentration.

公开(公告)号：JPH01287445A

公开(公告)日：1989-11-20

申请号：JP11719888

申请日：1988-05-13

Applicant: MINOLTA CAMERA KK

Inventor： SAKAI TAKAO ,  KAMEZAWA HITOSHI

IPC: G01N21/27 ,  G01N21/31 ,  G01N21/63 ,  G01N21/84

Abstract: PURPOSE:To measure concentration efficiently with high accuracy by correcting the measured quantity of light in a specific wavelength range from a light emitting diode with temperature according to measured temperature and stored information. CONSTITUTION:A temperature measuring circuit 23 measures the temperature of red and infrared light emitting diodes 4 and 5 as forward voltage drops so as to compensate characteristic variation with temperature. A control arithmetic circuit 21 which serves as a correcting means controls an LED driving circuit 22 and an AD converting circuit 25 to control the amplification factor, etc., of a current-voltage converting circuit 24, corrects the measured value according to a calibration value stored in a calibration value storage circuit 26 and information regarding temperature characteristics of the light emitting diodes, etc., and also calculates chlorophyll concentration from the calibrated light quantity and transmitted light quantity which are measured and corrected in both red and infrared wavelength ranges, so that the calculated chlorophyll concentration is displayed on a display element 31. Thus, the concentration is measured efficiently with high accuracy.

公开(公告)号：JPH01287444A

公开(公告)日：1989-11-20

申请号：JP11719788

申请日：1988-05-13

Applicant: MINOLTA CAMERA KK

Inventor： KAMEZAWA HITOSHI

IPC: G01J3/427 ,  G01N21/27 ,  G01N21/31 ,  G01N21/63 ,  G01N21/84

Abstract: PURPOSE:To find the concentration of a specific material in a sample with high accuracy by finding the peak wavelength of 2nd light source light after it shifts owing to temperature variation and then correcting an absorbance difference with the coefficient of absorbance of the specific material corresponding to the peak wavelength. CONSTITUTION:A light receiving element 6 detects the quantities of light beams which are emitted by a red light emitting diode 4 and an infrared-light emitting diode 5 and transmitted through the sample and they are inputted to a control arithmetic circuit 21. The control arithmetic circuit 21 calculates the difference in absorbance between both light beams from the measured values. Further, a temperature measuring circuit 23 measures the temperature variation of both light emitting diodes 4 and 5 and the light receiving element 6 at the time of measurement for calibration. The control arithmetic circuit 21 finds the peak wavelength of the infrared-light emitting diode 5 after it shifts owing to the measured temperature variation and corrects the calculated difference in absorbance with the absorbance coefficient of the specific material corresponding to the found peak wavelength. Thus, the concentration of the specific material in the sample is found with high accuracy.