Shizuoka University

Brookman Technology, Inc.

Keigo Isobe

Shoji Kawahito

Masanori Nagase

Jong-ho Park

Satoshi Aoyama

A distance image capturing device according to the present invention includes a light source unit that emits radiation light into a measurement space which is a space to be measured, a distance image sensor that receives light including reflected light reflected from an object in the measurement space as incident light, accumulates charges generated by the incident light for each pixel, and generates a distance image formed from a charge amount of the charges accumulated for each pixel, and a distance image processing unit that stores a signal value based on a non-controlled charge regardless of a control of accumulating charges in the distance image sensor, from the charge amount in the distance image, and corrects and acquires a distance to the object in the space by using the stored signal value.

Distance image capturing device and distance image capturing method

A cyclic A/D converter which can reduce the number of reference voltages for D/A conversion is provided. The cyclic A/D converter () comprises a gain stage (), an A/D converter circuit (), a logic circuit (), and a D/A converter circuit (). In an operational action of the gain stage (), an operational value (V) is generated by the use of an operational amplifier circuit () and capacitors (). The gain stage () operates as receiving three kinds of voltage signal from the D/A converter circuit () by the switching of two kinds of voltage signal (V, V) to be applied to the capacitors () in a switching circuit (). That is, the D/A converter circuit () provides a voltage signal (V) to the capacitors (), in response to a value (D=2) of a digital signal (B, B), provides voltage signals (V, V) to the capacitors (), respectively, in response to a value (D=1) of the signal (B, B), and provides the voltage signal (V) to the capacitors (), in response to a value (D=0) of the signal (B, B).

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Hamamatsu, Japan

Keigo Isobe