Reflective OHPs

Goodwin · 22nd February 2005, 09:45 PM

Has anyone had experience using a reflective OHP?
I can get a cast off from work for free, but don't know if it'll work as well? Elite Ambassador.

"Overhead projectors are of two types;
Transmissive This is where the bulb is positioned in the normal position underneath the glass surface with the light shining upwards through the foil. These units are rather bulky and best suited to use within one
building.

Reflective This is where the bulb is contained in the head of the projector and the base consists of a thin reflective mirror. They are more compact and better suited to the mobile presenter."

bodgy · 23rd February 2005, 01:19 AM

It may have some extremely good optics so definately take it if it's free, but you can't just slap a panel on one and have it work like a transmissive ohp would.

Guy Grotke · 23rd February 2005, 08:50 AM

About all you can use from a reflective projector is the projection lens, but what's wrong with that? You can save yourself some money. And it might just be a very good lens! It also may have a built-in first surface mirror that will let you make a smaller projector.

22nd February 2005, 09:45 PM	#1
Goodwin diyAudio Member Join Date: Feb 2005 Location: Leeds	Reflective OHPs Has anyone had experience using a reflective OHP? I can get a cast off from work for free, but don't know if it'll work as well? Elite Ambassador. "Overhead projectors are of two types; Transmissive This is where the bulb is positioned in the normal position underneath the glass surface with the light shining upwards through the foil. These units are rather bulky and best suited to use within one building. Reflective This is where the bulb is contained in the head of the projector and the base consists of a thin reflective mirror. They are more compact and better suited to the mobile presenter."

23rd February 2005, 08:50 AM	#3
Guy Grotke diyAudio Member Join Date: Sep 2004 Location: Vista, CA	the price is right! About all you can use from a reflective projector is the projection lens, but what's wrong with that? You can save yourself some money. And it might just be a very good lens! It also may have a built-in first surface mirror that will let you make a smaller projector.

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23rd February 2005, 01:19 AM	#2
bodgy diyAudio Member Join Date: Aug 2004 Location: Australia, North Coast NSW	It may have some extremely good optics so definately take it if it's free, but you can't just slap a panel on one and have it work like a transmissive ohp would.

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