| 词条 | Slotted optical switch |
| 释义 |
The slotted optical switch, sometimes known as opto switch or optical switch but not to be confused with the optical component, is a device comprising a photoemitter (e.g. LED) and a photodetector (e.g. photodiode) mounted in a single package so that the photoemitter normally illuminates the photodetector, but an opaque object can be inserted in a slot between them so as to break the beam. Associated circuitry is provided which changes state when the beam is interrupted. For example, the carriage of a computer printer may be fitted with a projection which interrupts the beam of a slotted switch when it reaches the end of its travel, causing circuitry to react appropriately. Another application of the slotted switch is in the type of computer mouse with a rotating ball. The ball measures distances moved by rotating orthogonal shafts which drive optical chopper wheels turning in the slots of slotted switches.[1] This device uses the same basic components as an opto-coupler, but is operated by manipulating the light path instead of the photoemitter input. Illustrations and data on slotted optical switches are to be found in catalogues and manufacturers' data sheets.[2] References1. ^[https://books.google.com/books?id=Qq0CVfcAktUC&pg=PA132&dq=mouse+opto+switch&hl=en&ei=V9uZTM-DB42OjAeLo1w&sa=X&oi=book_result&ct=result&resnum=4&ved=0CDkQ6AEwAw#v=onepage&q=mouse%20opto%20switch&f=false 123 robotics experiments for the evil genius By Michael Predko, Myke Predko: description of wheeled mouse operation] {{electronics-stub}}2. ^Datasheet of typical optical switch 1 : Optoelectronics |
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