Republic Rd

Republic Rd

Randburg

2194

Gauteng

South Africa

53a Victoria Rd

Victoria Rd

Woodstock

7925

Western Cape

South Africa

-33.92849

18.44613

55 Cross Lne

Cross Lne

Randburg

2194

Gauteng

South Africa

454 Valley Rd

Valley Rd

Randburg

2194

Gauteng

South Africa

-26.133165

27.975848

5 VictoriaLfts

VictoriaLfts

Ferndale

Gauteng

South Africa

-26.09144

27.991194

Tungsten Rd

2 Commercial City,Ground Floor Level

Tungsten Rd

Randburg

2000

Gauteng

South Africa

15 Alexandra St

Alexandra St

Randburg

2194

Gauteng

South Africa

-26.18639

28.05165

Olievenhout Ave

Shop 28 Northgate SCntr

Olievenhout Ave

Randburg

2162

Gauteng

South Africa

-26.0609599

27.955513

62 Fifth Ave

Fifth Ave

Randburg

2125

Gauteng

South Africa

-26.106728

27.979174

BOUVET AVE

6 BERENICE PLACE

BOUVET AVE

RANDBURG

South Africa

-26.10616

27.98572

7 Serruna St

Serruna St

Randburg

2160

Gauteng

South Africa

-26.07626

27.97892

Jacaranda Av

GMH House Office BlockA Meadowbrook Bus Est

Jacaranda Av

Randburg

2158

Gauteng

South Africa

-26.05951

27.97518

16 GEORGE ST

GEORGE ST

Randburg

2194

Gauteng

South Africa

-26.124389

27.979546

454 Valley Rd

Valley Rd

Fourways

2194

Gauteng

South Africa

-26.100118

28.014882

Overhead projector

An overhead projector is a projector that throws an enlarged image of a transparency onto a surface above and behind the person using it. Images are redirected by an overhead mirror.

Overhead projectors were largely used both in offices, schools and churches before other technologies were introduced that led to their decrease in use.
Overhead projectors use either of the three optics. Namely direct optics, folded optics and reflected light optics. All these serve the same purpose that is to allow the projector to project an image on a surface, they however vary in technique.

A direct optics projector puts the optics and light source in a straight line, allowing the image to be reflected from a mirror onto the screen. Such an overhead projector is very common and affordable. It however does have its cons such as getting hot during usage. Folded optics allow one to put the mirror in between the lamp and lens, the light source is surrounded by an elliptical faceted reflector. Last but not least, a reflected light optic makes use of a lens that is specially designed and backed up by a mirror. Light is directed towards the lens and travels through it to the main projective lens

Overhead projectors are quite useful and are easy to use as compare to other digital projector versions that have been introduced over the years. To find out more about overhead projectors, browse our Yellow Pages listings.

Overhead projector

An overhead projector is a projector that throws an enlarged image of a transparency onto a surface above and behind the person using it. Images are redirected by an overhead mirror.

Overhead projectors were largely used both in offices, schools and churches before other technologies were introduced that led to their decrease in use.
Overhead projectors use either of the three optics. Namely direct optics, folded optics and reflected light optics. All these serve the same purpose that is to allow the projector to project an image on a surface, they however vary in technique.

A direct optics projector puts the optics and light source in a straight line, allowing the image to be reflected from a mirror onto the screen. Such an overhead projector is very common and affordable. It however does have its cons such as getting hot during usage. Folded optics allow one to put the mirror in between the lamp and lens, the light source is surrounded by an elliptical faceted reflector. Last but not least, a reflected light optic makes use of a lens that is specially designed and backed up by a mirror. Light is directed towards the lens and travels through it to the main projective lens

Overhead projectors are quite useful and are easy to use as compare to other digital projector versions that have been introduced over the years. To find out more about overhead projectors, browse our Yellow Pages listings.

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