公开(公告)号：US3711208A

公开(公告)日：1973-01-16

申请号：US3711208D

申请日：1971-03-30

Applicant: CIBA GEIGY AG

Inventor： ABBONDIO A

IPC: G01J1/16 ,  G01J1/24 ,  G01N21/06 ,  G01N21/22

CPC classification number: G01J1/16 ,  G01J1/24

Abstract: The invention relates to a densitometer in which the slope of the density curve is adjustable. The densitometer provides a rotatable grey wedge disc and a rotatable chopper disc disposed so that a measuring light beam can pass through both discs and an object to be subjected to measurement and a reference light beam can pass only through the chopper disc. Both beams then image on a photoelectric detector which feeds corresponding signals to a comparator. When a starting position on the rotatable grey wedge disc passes a predetermined point, a circuit is opened which permits the comparator to connect a counter to a counting pulse transmitter, provided also that a predetermined relationship, for example equality, exists between said signals. The pulse repetition rate of the counting pulse transmitter is preferably controlled in dependence upon the rotational speed of the chopper disc and the slope of the density curve can be varied by adjusting the ratio between the rotational speed of the grey wedge disc and the pulse repetition rate. Where the pulse repetition rate is dependent upon the speed of the chopper disc, this adjustment is effected by a variable speed gear between the discs.

Abstract translation: 本发明涉及密度曲线的斜率可调的密度计。 密度计提供可旋转的灰楔形盘和可旋转的斩光盘，其设置成使得测量光束可以通过两个盘和待测量的物体，并且参考光束可以仅通过斩波盘。 然后两个光束在光电检测器上成像，该光电检测器将相应的信号馈送到比较器。 当可旋转灰楔形盘上的起始位置通过预定点时，打开电路，其允许比较器将计数器连接到计数脉冲发射器，只要在所述信号之间存在预定的关系，例如相等性。 计数脉冲发送器的脉冲重复率优选根据斩波盘的旋转速度进行控制，密度曲线的斜率可以通过调整灰楔形盘的转速与脉冲重复率之比 。 在脉冲重复率取决于斩波盘的速度的情况下，这种调节由盘之间的可变速度齿轮来实现。

公开(公告)号：US3664744A

公开(公告)日：1972-05-23

申请号：US3664744D

申请日：1969-09-02

Applicant: SMITH KLINE INSTR

Inventor： LISTON MAX D

IPC: G01J1/16 ,  G01N35/00 ,  G01N35/04 ,  H03M1/00 ,  G01J3/42 ,  G01J1/10 ,  G01N21/20

CPC classification number: G01J1/16 ,  H03M1/58

Abstract: A RATIO METR FOR GIVING THE LOG OF THE RATIO OF TWO VOLTAGES. AN RC CIRCUIT IS CHARGED AND ALLOWED TO EXPONENTIALLY DISCHARGE. COMPARATOR MEANS RECEIVE THE TWO VOLTAGES AND THE VOLTAGE OF THE RC CIRCUIT AND PROVIDE OUT PUT SIGNALS WHEN EACH OF THE TWO VOLTAGES IS EQUAL TO THE VOLTAGE OF THE RC CIRCUIT. THE TIME LAPSE BETWEEN SAID TWO SIGNALS CORRESPONDS TO THE LOG OF THE RATIO OF THE TWO VOLTAGES.

公开(公告)号：US3566133A

公开(公告)日：1971-02-23

申请号：US3566133D

申请日：1968-03-18

Applicant: COULTER ELECTRONICS

Inventor： DORMAN ERVIN L JR ,  HOGG WALTER R

IPC: G01J1/16 ,  G01J1/18 ,  H01J39/12

CPC classification number: G01J1/18 ,  G01J1/16

Abstract: Method for determining the hemoglobin content of a sample by the photoelectric monitoring of a reference and the sample and the transducing thereof into a pair of electrical signals representative of the relative light transmission of the two media. The reference signal is applied to a store and, through comparison with the sample signal, an output signal having a duration directly proportional to the hemoglobin content is elicited. Also, apparatus for carrying out such method in which a capacitive storage circuit is charged proportionally to the reference light transmission through use of a monochromatic light and photocell and is discharged to an intermediate value dependent upon the transmission of the sample, the duration of such discharging being the desired output. Interposed in series between the photocell and the storage circuit is an operational amplifier a diode and a switch. The amplifier provides a voltage follower enabling the diode to be a precise comparator between the two signal levels. The time dependent output is taken from the anode side of the diode.

公开(公告)号：US3355589A

公开(公告)日：1967-11-28

申请号：US38086064

申请日：1964-07-07

Applicant: TRW INC

Inventor： CLIFFORD RICHARD P

IPC: G01J1/16 ,  G01J5/20

CPC classification number: G01J1/16 ,  G01J5/20

公开(公告)号：US3167377A

公开(公告)日：1965-01-26

申请号：US20765362

申请日：1962-07-05

Applicant: TECHNICON INSTR

Inventor： PELAVIN MILTON H

IPC: G01J1/16 ,  G01J1/18 ,  G01N21/27

CPC classification number: G01J1/18 ,  G01J1/16 ,  G01N21/27 ,  G01N21/274

公开(公告)号：US3068746A

公开(公告)日：1962-12-18

申请号：US554160

申请日：1960-01-29

Applicant: NORTH AMERICAN AVIATION INC

Inventor： VAWTER DONALD D

IPC: G01J1/16 ,  G01J5/62

CPC classification number: G01J5/62 ,  G01J1/16

公开(公告)号：US2911881A

公开(公告)日：1959-11-10

申请号：US61601156

申请日：1956-10-15

Applicant: GEN ELECTRIC

Inventor： FRANKLIN SANDFORD G

IPC: G01J1/16 ,  G01J1/36

CPC classification number: G01J1/36 ,  G01J1/16

公开(公告)号：US1938544A

公开(公告)日：1933-12-05

申请号：US67435733

申请日：1933-06-05

Applicant: LIGHT RES CORP

Inventor： SCHOENBERG VIRGIL A

IPC: G01J1/16 ,  G01N21/25

CPC classification number: G01J1/16 ,  G01N21/251

公开(公告)号：US11885672B2

公开(公告)日：2024-01-30

申请号：US17589098

申请日：2022-01-31

Applicant: Lutron Technology Company LLC

Inventor： James P. Steiner ,  Greg Edward Sloan ,  Nathan A. Boring

IPC: G01J1/02 ,  G01J1/16 ,  G01J1/32 ,  H05B47/11 ,  H05B47/10 ,  H05B47/19 ,  G01J1/44

CPC classification number: G01J1/02 ,  G01J1/0219 ,  G01J1/0228 ,  G01J1/0247 ,  G01J1/16 ,  G01J1/32 ,  G01J1/44 ,  H05B47/10 ,  H05B47/11 ,  H05B47/19 ,  Y02B20/40

Abstract: A wireless battery-powered daylight sensor for measuring a total light intensity in a space is operable to transmit wireless signals using a variable transmission rate that is dependent upon the total light intensity in the space. The sensor comprises a photosensitive circuit, a wireless transmitter for transmitting the wireless signals, a controller coupled to the photosensitive circuit and the wireless transmitter, and a battery for powering the photosensitive circuit, the wireless transmitter, and the controller. The photosensitive circuit is operable to generate a light intensity control signal in response to the total light intensity in the space. The controller transmits the wireless signals in response to the light intensity control signal using the variable transmission rate that is dependent upon the total light intensity in the space. The variable transmission rate may be dependent upon an amount of change of the total light intensity in the space. In addition, the variable transmission rate may be further dependent upon a rate of change of the total light intensity in the space.

公开(公告)号：US11864866B2

公开(公告)日：2024-01-09

申请号：US17296023

申请日：2019-12-04

Applicant: Cortirio Limited

Inventor： Patrick John Beldon ,  Paul David Macey

IPC: A61B5/00 ,  G01J1/16 ,  G01J1/42 ,  G01J3/28 ,  G01J1/44

CPC classification number: A61B5/0075 ,  G01J1/16 ,  G01J1/4228 ,  G01J3/2823 ,  G01J2001/446

Abstract: A method of measuring light intensity for imaging using a light detector array comprising a plurality of light detectors arranged to generate an output corresponding to an intensity of incident light. In a first measurement mode the light detector array generates a first plurality of output signals, each generated by one group of proximate light detectors, each group comprising a light detector pair, the first plurality of output signals each corresponding to a difference between the light intensity detected by the light detectors of the group, and generating a light intensity measurement for each group from each received output signal of the first plurality of output signals. In a second measurement mode the light detector array generates a second plurality of output signals, and a light intensity measurement is generated for each light detector from the second plurality of output signals.