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 way of these interactions I’ve accrued notes and data that has impressed me to jot down 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 sequence of articles that will probably be written from an expert Electronics Technicians standpoint with reference to a few of in the present day’s commonest Overhead Projector issues.
My purchasers typically ask me “What is the huge deal about changing that reflective mirror of their Overhead Projector? A mirror is only a mirror, proper?”
Effectively in actuality it’s a very huge deal. There’s a enormous distinction between a entrance floor which is what your mirrors are in your Overhead Projector and a normal mirror which is what you’ll 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 normal mirror is on the again aspect. If a normal mirror is utilized in your Overhead Projector it’s going to shatter from the warmth. The reflective floor of a entrance floor mirror doesn’t soak up the warmth like a normal mirror does. Typically there are two varieties of mirrors in your Overhead Projector.
Physique Mirror: The Physique mirror generally is the mirror discovered within the base (physique) of your overhead projector. The aim of this mirror is to replicate the transmitted mild from the projection lamp to the mirror after which via the Fresnel lens and on to the main target head meeting.
Head Mirror: The top mirror typically known as the reflective mirror, is positioned within the head of the Overhead Projector. The aim is to take the sunshine that’s mirrored from the bottom, replicate it via the exit lens of the pinnacle and naturally on to your wall or display screen the place you’re projecting the picture out of your transparencies.
So the reply to the query “Cannot I simply have a mirror reduce at my glass store?” is a powerful no. Entrance floor mirrors generally will have to be bought from a licensed components distributor or straight from the producer. The price of these mirrors will doubtless be increased as a result of they’re a specialty mirror that’s not simply sourced from an area glass store.