JPS63150323U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the main parts of a rotary encoder according to the first embodiment of this invention, FIG. 2 is a diagram showing the main parts of the rotary encoder when the movable slit is viewed from above, and FIG. are block diagrams explaining the circuit configuration of the rotary encoder, FIG. 4a, FIG. 4b, FIG. 4c, FIG. 4d, FIG. 5a,
5b, 5c, and 5d are diagrams explaining the operation of the rotary encoder, and FIG. 6 is a sectional view showing the main parts of a linear encoder according to a second embodiment of the invention. , FIG. 7a and FIG. 7b are diagrams illustrating a conventional photoelectric encoder. 2a, 2b, 12a, 12b: photodiode, 3a, 3b, 13a, 13b: light emitting diode, 4a, 4b, 14a, 14b: fixed slit,
6, 16: Movable slit, 9: Adder circuit.

Claims (1)

[Claims for Utility Model Registration] A light-receiving element, a light-emitting element that emits light to the light-receiving element, and a movable slit that each has a light-transmitting part and that interrupts an optical path connecting the light-emitting element and the light-receiving element. In a photoelectric encoder comprising a fixed slit, each of the light receiving element and the fixed slit has two
The first fixed slit is arranged on the opposite side of the movable slit with respect to the second fixed slit, and the first light receiving element has a first fixed slit light-transmitting part and a movable slit light-transmitting part. At the same time, the second light-receiving element receives the light that has passed through the second fixed slit light-transmitting part and the movable slit light-transmitting part, and the signals of the first and second light-receiving elements are received. A photoelectric encoder characterized by adding up and outputting.