公开(公告)号：US3582220A

公开(公告)日：1971-06-01

申请号：US3582220D

申请日：1969-02-18

Applicant: ASAHI OPTICAL CO LTD

Inventor： NOBUSAWA TSUKUMO

IPC: G01J1/44 ,  G01J1/10 ,  G01J1/12

CPC classification number: G01J1/44

Abstract: A light contrast meter successively exposable to different light intensities provides a visual indication of the light intensity extremes or the difference between the light intensity extreme and the immediate incident light. In one form a capacitor is charged through a diode to a voltage corresponding to maximum incident light and is connected in series with an impedance the voltage across which varies with the incident light and a meter measures the difference of this voltage and that across the capacitor. In another form a pair of photoconductors are connected in series with respective resistors one capacitor being connected through a diode across the first resistor and another capacitor being connected through a diode across the second photoconductor and meters measure the capacitor voltages.

公开(公告)号：US3455220A

公开(公告)日：1969-07-15

申请号：US3455220D

申请日：1966-07-13

Applicant: POLAROID CORP

Inventor： DIETZ MILTON S

IPC: G03B13/02 ,  G03B17/20 ,  G01J1/12

CPC classification number: G03B17/20 ,  G03B13/02

公开(公告)号：US3413066A

公开(公告)日：1968-11-26

申请号：US41097764

申请日：1964-11-13

Applicant: POLAROID CORP

Inventor： BIBER CONRAD H ,  TOPAZ JEREMY M

IPC: G01J1/12 ,  G01J1/42

CPC classification number: G01J1/4214 ,  G01J1/12 ,  G01J1/124

公开(公告)号：US1498214A

公开(公告)日：1924-06-17

申请号：US33568419

申请日：1919-11-04

Applicant: HOLOPHANE GLASS COMPANY INC

Inventor： TUCK DAVIS H

IPC: G01J1/12

CPC classification number: G01J1/12

公开(公告)号：US1437399A

公开(公告)日：1922-12-05

申请号：US11237916

申请日：1916-07-31

Applicant: KALMUS COMSTOCK & WESCOTT INC

Inventor： COMSTOCK DANIEL F

IPC: G01J1/12

CPC classification number: G01J1/12

公开(公告)号：US20200234659A1

公开(公告)日：2020-07-23

申请号：US16744633

申请日：2020-01-16

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Wanjae JU ,  Nanyoung PARK ,  Jungyong YUN ,  Heewoong YOON

IPC: G09G3/34 ,  H04M1/22 ,  G01J1/12

Abstract: According to various embodiments, an electronic device includes a housing, a display viewable through a front surface of the housing and configured to display a screen, a camera sensor disposed in at least a portion of the front surface of the housing and configured to measure an external illuminance, a processor operationally connected to the display and the camera sensor; and a memory operationally connected to the processor. The memory may store instructions that, when executed, cause the processor to control the electronic device to: detect an turn-on event of the display, turn on the camera sensor to acquire the external illuminance using the camera sensor based on the display being turned on, acquire preview image information for a specified time through the camera sensor, turn off the camera sensor, acquire the external illuminance using an exposure time and a brightness value based on the acquired preview image information, and control a luminance of the display based on the external illuminance.

公开(公告)号：US20200045218A1

公开(公告)日：2020-02-06

申请号：US16511476

申请日：2019-07-15

Applicant: Samsung Electronics Co., Ltd.

Inventor： Sunil RATHOUR ,  Nitesh GOYAL ,  Pranav JADAV ,  Ankit AGARWAL ,  Avinash THAKUR

IPC: H04N5/235 ,  H04M1/725 ,  G01J1/12 ,  G05D25/02

Abstract: An electronic device for controlling a brightness of a light source and an operating method of the electronic device are provided. According to the electronic device and the operating method, an image including an ambient environment of a light source is captured, information of an exposure of the captured image is obtained, information about a brightness of the ambient environment of the light source is determined based on the information about the exposure, and a brightness of the light source is controlled based on the determined information about the brightness of the ambient environment.

公开(公告)号：US20180052047A1

公开(公告)日：2018-02-22

申请号：US15555219

申请日：2016-03-02

Applicant: NATIONAL UNIVERSITY CORPORATION NAGOYA UNIVERSITY ,  SEKISUI MEDICAL CO., LTD.

Inventor： Tetsuo IGUCHI ,  Hideki TOMITA ,  Norihiko NISHIZAWA ,  Takahiro HIROTSU ,  Satoshi YURUZUME ,  Ryohei TERABAYASHI ,  Toshinari OH-HARA ,  Akira IDENO ,  Atsushi SATO

IPC: G01J3/02 ,  G01J3/42 ,  G01J1/12 ,  G01N21/3504 ,  G01N30/88 ,  G02F1/355

CPC classification number: G01J3/0218 ,  G01J1/124 ,  G01J3/0208 ,  G01J3/42 ,  G01N21/01 ,  G01N21/3504 ,  G01N30/88 ,  G01N2030/8868 ,  G01N2201/06113 ,  G01N2201/08 ,  G02F1/3551 ,  G02F1/37 ,  G02F2201/02 ,  G02F2203/56

Abstract: A carbon isotope analyzer 1 includes a carbon dioxide isotope generator 40 that includes a combustion unit that generates gas containing carbon dioxide isotope from carbon isotope, and a carbon dioxide isotope purifying unit; a spectrometer 10 including an optical resonator 11 having a pair of mirrors 12, and a photodetector 15 that determines the intensity of light transmitted from the optical resonator 11; and a light generator 20 including a light source 23, a first optical fiber 21 to transmit a light beam from the light source 23, a second optical fiber 22 for wavelength conversion, the second optical fiber 22 splitting from the first optical fiber 21 at a point and combining with the first optical fiber 21 at another point downstream of the splitting point, and a non-linear optical crystal 25 that generates light having the absorption wavelength of the carbon dioxide isotope on the basis of the difference in frequency between light beams transmitted through the optical crystal 25. The carbon isotope analyzer 1 is a simple and convenient apparatus that can analyze isotope 14C.

公开(公告)号：US06909499B2

公开(公告)日：2005-06-21

申请号：US10267532

申请日：2002-10-09

Applicant: Ulrich Sander

Inventor： Ulrich Sander

IPC: A61B19/00 ,  G02B21/00 ,  G02B21/06 ,  H05B37/03 ,  G01J1/12 ,  G01B11/00

CPC classification number: G02B21/0012 ,  G02B21/06

Abstract: The invention concerns a light source having an apparatus for measuring the brightness of the illumination system of an optical viewing device, for example a microscope, in which at least one light sensor (3a) for measuring the intensity of the lamp (1) is arranged, for example, next to the optical waveguide (2). That measurement can be passed on to the user (9), either acoustically or visually, via an electronic unit (4) which compares the measurement to a definable threshold value.

Abstract translation: 本发明涉及一种光源，其具有用于测量光学观察装置（例如显微镜）的照明系统的亮度的装置，其中至少一个用于测量灯（1）的强度的光传感器（3a） 布置在例如光波导（2）旁边。 该测量可以经由电子单元（4）通过声学或视觉传递给用户（9），电子单元（4）将测量值与可定义的阈值进行比较。

公开(公告)号：US5606393A

公开(公告)日：1997-02-25

申请号：US548666

申请日：1995-10-26

Applicant: Hans-Joerg Schoenherr ,  Hans Zimmet ,  Michael Lenk ,  Karl-Heinz Werner ,  Udo Postel

Inventor： Hans-Joerg Schoenherr ,  Hans Zimmet ,  Michael Lenk ,  Karl-Heinz Werner ,  Udo Postel

IPC: G01J1/12 ,  G03B7/08 ,  G01J1/02 ,  G01J1/42 ,  G03B37/00

CPC classification number: G01J1/122

Abstract: An illumination measuring device for panoramic picture taking has a first photoelectric illumination intensity receiver which diffusely determines light falling in a first measuring region and illuminating a first panoramic portion, at least one further photoelectric illumination intensity receiver which diffusely determines light falling in a second measuring region and illuminating a further panoramic portion, and an evaluating unit determining a deviation of an illumination intensity determined by the further illumination intensity receiver from an illumination intensity determined by the first illumination intensity receiver.

Abstract translation: 用于全景拍摄的照明测量装置具有第一光电照射强度接收器，其漫射地确定落在第一测量区域中的光并照亮第一全景部分，至少一个另外的光电照射强度接收器，漫射地确定落在第二测量区域中的光 并且照亮另外的全景部分，以及评估单元，确定由所述另外的照明强度接收器确定的照明强度与由所述第一照明强度接收器确定的照明强度的偏差。