JPS62150640U

JPS62150640U -

Info

Publication number: JPS62150640U
Application number: JP3842386U
Authority: JP
Priority date: 1986-03-18
Filing date: 1986-03-18
Publication date: 1987-09-24

Description

[Brief explanation of the drawing]

第１図は、この考案による積算光量計のブロツ
ク図、第２図は従来の積算光量計のブロツク図、
第３図はＶ／Ｆコンバータの変換特性、第４図は
従来の積算光量計におけるＩ／Ｖ変換回路、Ｖ／
Ｆコンバータ及びカウンターの各出力信号の波形
図である。図中、１：受光器、２：Ｉ／Ｖ変換回路、３：
Ｖ／Ｆコンバータ、４：コンパレータ、５：ゲー
ト、６：カウンター。 Figure 1 is a block diagram of the integrating light meter according to this invention, Figure 2 is a block diagram of a conventional integrating light meter,
Figure 3 shows the conversion characteristics of the V/F converter, Figure 4 shows the I/V conversion circuit in a conventional integrated light meter, and the V/F converter.
FIG. 3 is a waveform diagram of each output signal of an F converter and a counter. In the figure, 1: Photoreceiver, 2: I/V conversion circuit, 3:
V/F converter, 4: comparator, 5: gate, 6: counter.

Claims

[Scope of utility model registration request]

It is equipped with a photoreceiver, an I/V conversion circuit, a V/F converter, a gate, and a counter in order.
A comparator is provided in parallel with the F converter, and one input terminal of the comparator receives the output signal of the I/V conversion circuit, and the other input terminal receives the output signal of the I/V conversion circuit, which is slightly higher than the noise included in the output signal of the I/V conversion circuit. Input the reference voltage and set V/ to one input terminal of the gate.
An integrating light meter characterized in that the output signal of the F converter is input to the other input terminal, and the output signal of the comparator is input to the other input terminal.