SU672511A1 - Two-channel scanning microphotometer - Google Patents

Description

(54) TWO.LNLLYY SK.LIRATING MICROPHOTOMETER

The invention is related to | -Enchke izmerenpy oiiTiiMocKoii density of objects and could be) iicno.ib3 () at B io; ie (| x) iso1) and kep11Y li computer n | in 11cc, 1 (changing {) came from 1k in fot () | -measuret.

One of the pz1 handheld devices d.1 of the optical linkage contains measure. Booby and:) ta,: k) 1PP) 1Y (liter channels, b.yuki signal processing 1 |. DEP {) the device's device - the pizka accuracy 1P1Y.

The closest technical description of the invention is a two-beam micro (1) otometer, containing measuring and reference c) transmitters with an .1 () 1-digit digital conversion., Fired, from Kf) TOpoiT) are connected .e ycipoiicTBO and search scheme, successively sg) unit 111 From device (input | and coding block, output which is connected with zanomineyu-1M device, and control unit: up () miniupi device i circuit iioiici .; J2 I.

i; e; 1 () stat: om known 1pc (|) () tomometer is nsv1 1koy accuracy, (due to the fact that the measurement accuracy of the optical tube); ns-isdrstvdino is varied to 1x transient stability; ma, since this measurement is investigated in an object with an object; Measurement of the implication to:.) Itieite and transmission ()) of the otometric tract, o6yc, ioii, ieniioe, change pk () of this, illuminate, 1, part 1 of the photoreceptor, coefficient). synil usnitel, it may impose) to 1 and greet m.

Tsm invention - new precision.

D, 1. Comprehensions are indicated; t. Of the solution; programs, P) m behind the i coordinate 1at. unit in 1ravlen rator clock 1 pulses. When the unit is set to coordinates, it is connected with the outputs; - I |) Otometer channels and input devices, as well as with the inputs of the clock generator x and the emulator and block)) with the cxeMoii device. The block, connected with (|) () then 1tr 1 ches 1 ka.na ,, and енераnent () p tact m,, s (1H cb, ko.), Device 1) C OISC.

To the drawing (, rare, structural scheme, which is 10 10) MnKpoijioTOM.eij) ;;.

The microphotometer contains measuring il 1 and reference 2 photometric channels, input device 3, analog-to-digital converter (ACI) 4, memory 5, coding unit 6, poi scheme 7, block 8 of memory management and search circuit, setting unit coordinates 9, a control unit 10 and a clock pulse generator 1I.

The device works as follows.

At the beginning of the operation, the operator, through the input device 3, writes into us the unit coordinates of coordinates 9 a sequence of ns N coordinates of the X-points of the standard with known density values of the corresponding values D ;, is typed by the operator on the console and transmitted through the coding unit 6 to in the same order as the X coordinates;,. Then the setting unit 9 is transferred to the generation mode of the specified codes. This periodically, at selected intervals of time, he gives out groups of previously recorded coordinates of certain points of the standard, followed by the clock pulses of the standard. The clock pulses of the standard, entering the control unit 8, ensure that the coded values of the photometric signal Vi from the standard, 1-Ounyun-1x with ACI 4, are written to the memory device. With the help of the control unit 10, the read beam is set at the selected points of the standard and performs photometric measurement.

In the periods between i-rupns of impulses of the standard, the setpoint generator 9 generates a sequence of codes of coordinates of the object being measured, followed by their clock pulses. The coordinate codes of the object through the control unit 10 install the reading beam at the corresponding points of the object, providing a Vx code at the output of the channel I and in the search circuit 7. Each object clock of the object arriving at the generator 11 causes N pulses to appear . These impulses, passage to the control circuit 8, provide for reading from the loan device 5 codes (|) of the isometric signals Vj, and comparing them in the search circuit 7 with the photometric signal Vx from the object. In this scheme, the signal Vj, Vjf is used to extract the following values from the memory: t.

Part 1, on „D, j and obtaining the required D

interpolation.

The invention of the flaw detector is improved by the fact that the function D f (V) is re-recorded regularly at a given time interval, using which the density values D are calculated; (and all drifts, low-frequency measuring paths no longer affect the measurement accuracy parameter.

Claims (2)

1. Author's certificate of the USSR Le 257067, cl. G 01 J 1/18. 1966. 2. US Patent To 366.31 10. CL.356--203, it is a duplicate. 1972.