Bauhaus-Universität Weimar

Optic Projection: Principles, Installation and Use of the Magic Lantern, Projection Microscope, Reflecting Lantern, Moving Picture Machine
Gage, Henry Simon and Henry Phelps Gage
Fig. 97. Thompson's Reflectoscope, Model G-2,1913. 
(Cut loaned by A. T. Thompson & Co.). 
As here shown the instrument is ready for opaque and for transparency 
There arc additional attachments by which microscopic projection can be 
done with either a horizontal or a vertical microscope. There is also an 
arrangement for placing the magic lantern objective in a vertical position, 
and thus projecting horizontal objects. 
Commencing at the right: The lamp-house with arc lamp and condenser. 
This is at an angle so that opaque objects in a vertical position are lighted 
directly as in Chadbum’s opaque lantern (fig. 92). In this case the screen 
picture has the rights and lefts reversed. 
Above is the magic lantern objective for transparencies. 
Below is the large aperture, long focus projection objective for opaque ob¬ 
jects. The objective is inserted in the dark chamber containing mirrors for 
reflecting the light upward for transparency projection, or downward for the 
opaque objects in a horizontal position. 
Above is shown a lantern slide in the carrier and below a book in a horizontal 
and a picture in a vertical position. 
With the opaque object in a horizontal position the light is reflected from, a 
mirror down upon the object, the light from the opaque object is then reflected, 
in part, back to the same mirror and from the mirror out through the projec¬ 
tion objective to the screen. The screen image in this case will be erect in 
every way if properly placed on the holder.


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