Over the previous 25 years I’ve had the distinctive alternative to speak straight with lots of the professionals and instructors who use Overhead Projectors as an integral a part of their career. By these interactions I’ve collected notes and knowledge that has impressed me to put in writing these articles that pertain to a number of the commonest issues skilled by house owners of in the present day’s and yesterday’s Overhead Projectors.
That is the fourth article in a collection of articles that shall be written from an expert Electronics Technicians perspective with reference to a few of in the present day’s commonest Overhead Projector issues.
My purchasers usually ask me “What is the massive deal about changing that reflective mirror of their Overhead Projector? A mirror is only a mirror, proper?”
Effectively in actuality it’s a very massive deal. There’s a large distinction between a entrance floor which is what your mirrors are in your Overhead Projector and a regular mirror which is what you’d discover in your house. A entrance floor mirror is simply the way it sounds. The mirroring floor is on the entrance, the place there mirroring on a regular mirror is on the again aspect. If a regular mirror is utilized in your Overhead Projector it would shatter from the warmth. The reflective floor of a entrance floor mirror doesn’t take up the warmth like a regular mirror does. Usually there are two forms of mirrors in your Overhead Projector.
Physique Mirror: The Physique mirror normally is the mirror discovered within the base (physique) of your overhead projector. The aim of this mirror is to mirror the transmitted gentle from the projection lamp to the mirror after which via the Fresnel lens and on to the main focus head meeting.
Head Mirror: The pinnacle mirror typically known as the reflective mirror, is situated within the head of the Overhead Projector. The aim is to take the sunshine that’s mirrored from the bottom, mirror it via the exit lens of the top and naturally on to your wall or display the place you’re projecting the picture out of your transparencies.
So the reply to the query “Cannot I simply have a mirror lower at my glass store?” is a powerful no. Entrance floor mirrors normally will have to be bought from a licensed elements distributor or straight from the producer. The price of these mirrors will seemingly be increased as a result of they’re a specialty mirror that’s not simply sourced from a neighborhood glass store.