Title:
REFERENCE PLANE SETTING DEVICE
Document Type and Number:
Japanese Patent JP2501081
Kind Code:
B2
Abstract:
PURPOSE: To provide a reference plane setting device which can make reference plane setting work easier.
CONSTITUTION: A light emitting and receiving means 26 is equipped with a light emitting and receiving sections LD and PD and connected to an automatic output adjusting circuit 44 composed of a transistor Tr, resistors R1-R5, Zener diode ZD, operational amplifier OP, and variable resistor VR. In addition, a rotation controlling section 46 incorporating a capacitor C, amplifier AM, monostable multivibrator MM, flip flop FF, and switching circuit SW is provided. A motor 20 which turns an irradiation light beam is connected to the output side of the circuit SW. When the light beam is applied to a reflecting sheet plate, the reflected light is received at the receiving section PD and the signal corresponding to the reflected light is detected by means of the capacitor C. Based on the detected signal, the irradiation light beam is controlled so that the light beam can repeat oscillating motions within a prescribed angle range.
Inventors:
HOSHINO YUKITAKA
YAMAMURO HIDEKAZU
YAMAMURO HIDEKAZU
Application Number:
JP25556993A
Publication Date:
May 29, 1996
Filing Date:
October 13, 1993
Export Citation:
Assignee:
SOKKISHA
International Classes:
G01C15/00; H01L31/12; (IPC1-7): G01C15/00; H01L31/12
Domestic Patent References:
| JP6137870A |
Attorney, Agent or Firm:
Yagi Hideto