公开(公告)号：GB2017296A

公开(公告)日：1979-10-03

申请号：GB7908868

申请日：1979-03-13

Applicant: SONY CORP

IPC: G01J5/60 ,  H04N9/73 ,  G01J3/48

Abstract: Apparatus for detecting the color temperature of a source of light for use in, for example, a color television camera. First and second semiconductor photo-sensing elements are connected in series and are oppositely poled with respect to each other. Light of predetermined, respective colors having respectively different spectral characteristics is supplied to the first and second photo-sensing elements, for example, through different light filters. An output signal is derived from the opposite ends of the series circuit representing the color temperature of the light source. In a preferred embodiment, the output signal is produced by an operational amplifier having a pair of inputs, one of which being connected to one end of the series circuit, an output connected to the opposite end of the series circuit, and a resistance connected between the two inputs of the operational amplifier, the derived output signal being a voltage across the operational amplifier output and other input. In one application, the output voltage produced by the operational amplifier is supplied to a differential amplifier which, in turn, provides first and second voltages representing the relative intensities of the light received by the photo-sensing elements. The difference between these first and second voltages is combined with first and second color video signal components, respectively, such as color difference signals, so as to vary the levels of these respective color video signal components. The first and second voltages also are used to adjust the levels of the respective color video signal component outputs from the combining means so as to be substantially equal to the white balanced levels thereof at a predetermined color temperature. In another application, the voltage produced by the operational amplifier is supplied to the differential amplifier by yet another amplifier, and the differential amplifier includes a constant current source having a control input supplied with a color component voltage, such as the red color signal voltage VR or the blue color signal voltage VB. The differential amplifier has a single output for providing a white-balanced red or blue color signal voltage.

公开(公告)号：AU3183677A

公开(公告)日：1979-06-28

申请号：AU3183677

申请日：1977-12-21

Applicant: MILES LAB

Inventor： KRAMER DONALD L ,  WHITE JAMES A

IPC: G01J3/10 ,  G01J3/42 ,  G01J3/51 ,  G01N21/25 ,  G01N21/27 ,  G01J3/48 ,  G01N21/48

Abstract: Apparatus for measuring reflected or transmitted light is described. The apparatus comprises filter type spectrophotometer having a wavelength range of from about 200 nm (nanometers) to about 1,100 nm which includes a sample illuminating light source capable of producing an extremely intense light of short duration; light diffusing means; a light filter for transmission of a selected wave-length; at least two independent light sensing means; and separate means defining light transmission paths for the passage of light from the light source to one light sensing means and from the illuminated sample to the other light sensing means.

公开(公告)号：ATA226976A

公开(公告)日：1978-12-15

申请号：AT226976

申请日：1976-03-29

Applicant: SIEMENS AG

IPC: G01J3/50 ,  G01N21/25 ,  G01J3/48

Abstract: A two-beam colorimeter comprising an incandescent lamp, a resistor connected electrically in series with the incandescent lamp, a condenser and an interference filter disposed in side by side relation adjacent said incandescent lamp, a two-hole diaphragm for developing a comparison light beam and a measuring light beam, a reference filter disposed in the path of the comparison light beam, and an adjusting filter movable into and out of the path of the measuring light beam.

公开(公告)号：DE2710722A1

公开(公告)日：1978-09-14

申请号：DE2710722

申请日：1977-03-11

Applicant: SUGA SHIGERU

Inventor： SUGA SHIGERU

IPC: G01J3/10 ,  G01J3/51 ,  G01J3/48

Abstract: The colour meter providing e.g. a direct reading of three, colour stimulus values includes a hollow integrating sphere (1) with a filter mirror system directing light into the sphre, and a measuring unit. A lamp (11) lenses (6, 7) a heat shield (9) and a pinhole (8) direct a beam of light into the sphere. A filter mirror assembly (13) is mounted behind the lamp to reflect light to augment the beam etc. A sample (3) is mounted to be illuminated by the light beam with reflected light passing through a port (5) in the sphere to the measuring unit (15), through a filter (17). The energising voltage of the lamp is kept constant by a control (10) with the filter mirror system and the filter assembly (17) being adjusted simultaneously to the different selected colours.

公开(公告)号：FR2359406A1

公开(公告)日：1978-02-17

申请号：FR7622526

申请日：1976-07-23

Applicant: STERNDENT CORP

IPC: A61C13/08 ,  A61C19/04 ,  G01J3/51 ,  G01J3/48 ,  G01N21/22

Abstract: Digital-indicating colorimeter is designed esp. for quantitative measurement of tooth and filling colour to colour matching in dentistry. A light source (24) illuminates a sample and a measuring system measures at least two different colours of the illuminated sample. The measuring system comprises a light detector (18) producing an electrical output signal proportional to the incident light, a digital voltage measuring unit (8) producing an output signal representing the electrical output signal, and an indicator (10) which shows the amount of each colour of measured light from the sample. Pref. the light from the source is directed onto the sample by means of an optical fibre (14).

公开(公告)号：DE7726059U1

公开(公告)日：1978-02-09

申请号：DE7726059

申请日：1977-08-23

Applicant: AMELUNG, HANS-JUERGEN, 4518 BAD LAER

IPC: G01J3/48

公开(公告)号：FR2231958A1

公开(公告)日：1974-12-27

申请号：FR7418053

申请日：1974-05-24

Applicant: MAGYAR TUDOMANYOS AKADEMIA

IPC: G01J3/51 ,  G06G7/75 ,  G01J3/48

Abstract: The device comprises a sensor system consisting of three colour filters and one photocell which can carry out measurements in the internationally standardised (CIE), X, Y, Z colour coordinate system with good accuracy. The system converts, using linear transformation resistor network and summators, colour components values determined by instrument systems into corrected component values which better correspond to values measured in the international system. The colour coordinates are derived from the corrected values by a signal processing unit comprising an operational amplifier in a summating cct. and a digital ratiometer.

公开(公告)号：DE2130668A1

公开(公告)日：1973-01-11

申请号：DE2130668

申请日：1971-06-21

Applicant: GOLDWASSER DAVID G

IPC: G01J3/46 ,  G01J3/48

公开(公告)号：DE1522439B1

公开(公告)日：1972-06-08

申请号：DE1522439

申请日：1966-03-12

Applicant: BECKMAN INSTRUMENTS INC

Inventor： SLOANE HOWARD JULES

IPC: G02B5/20 ,  G01J3/48

公开(公告)号：DD279797A7

公开(公告)日：1990-06-20

申请号：DD29938487

申请日：1987-01-21

Applicant: SO RESPROM ,  UKRNIISHOM ,  SO PESPROM

Inventor： KAROV KALIN V ,  PETROV LJUDMIL A ,  TIBATTSCHEV OLEG G ,  PELOV VIKTOR E ,  BOJKOV VOJIDAR N ,  SKOROPAD VLADIMIR M ,  KASCHURKO ALEXANDR S ,  FEDOROV JURII I ,  TODOROV MITKO I ,  BOIKOV DIMITER T ,  SEREBRJAKOV IGOR N ,  GENOVA NINA T ,  BAKALOVA BOJANKA I ,  IVANOVA PENKA B ,  TERSIEV DIMITER V

IPC: G01J3/48