Kodak Carousel with 3D projection lens |
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| The concept of this system is projecting
stereoscopic slides with a one, standard 35 mm. slide
projector, in this case the Kodak Carousel. For this
system, both stereoscopic slides are mounted in one 50x50
mm. frame (GP 18x23+18x23). For this system a special
projection lens was designed. This lens contained 2
maginon lenses. The lenses are adjustable in height by
turning the total lens tube and separation by moving a
lever. In front of the lenses, inside the lens tube, two
glass polarizing filters are mounted. To get the right
light concentration in each projection lens individually,
a special condenser lens was placed behind the slides. Specifications: Design: ± 1982 The lens is used in medical applications. Optically it is a perfect system without any distortion and well adjustable for different distances. The disadvantage of the system was the small projection size, larger images were to dark to be viewed.
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Rollei 6x6 with 3D projection lens |
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| The concept of this system is projecting
stereoscopic slides with a one, standard 60x60 mm. slide
projector, in this case the Rollei 66AV. For this system,
both stereoscopic slides are mounted in one 70x70 mm.
frame with a special mask for different slide formats.
For this system a special projection lens was designed.
This lens contained 2 maginon lenses. The lenses are
adjustable in height by turning the total lens tube and
separation by moving a lever. In front of the lenses,
inside the lens tube, two glass polarizing filters are
mounted. To get the right light concentration in each
projection lens individually, a special condenser lens
was placed behind the slides. Specifications: Design: ± 1982 Optically it is a perfect system without any distortion and well adjustable for different distances. For the 70x70 slide frame several masks were available, ranging from 23x18 and 23x22 mm. horizontally mounted and 23x28 and 23x35 mm. above each other mounted. When the slides were mounted above each other, the lens had to be turned 90 degrees. The lens was used in medical applications.
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Oldest 'Hugo de Wijs' builded 3D projector |
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| The first manually controlled projector build by Hugo
de Wijs. It was made for 3D projection, panorama and mono
60x60 mm. projection. The main slide carrier could hold
several adapters for different slide frame formats. At
the same time you could project 3D slides as well as
60x60 mono slides over each other. The trick was to
project a stereoscopic image inside a black hole of a
mono 60x60 mm. slide. The stereoscopic part was also
suited with manually controlled fade-over system for mono
slides. The panorama part has never been finished. The
projector was suited with halogen 500 Watt 110 Volt
lamps. This large amount of produced heat had to be
cooled with a large fan. Because of large size of the
fan, it turned slowly and didn't make any noise. Specifications: Design: ± 1970 This projector was build to replace the old Pits Barmach projector which Hugo used during his presentations in the '60. Hugo already rebuild in 1960 the Pits Barmach projector to hold two 1000 Watt 110 Volt filament lamps. The new projector was very large, clumsy and heavy. He used it for 2 years during his presentations all over in the Netherlands. The projector was specially build for entertainment programs in theaters. On the photo you can see a special amplifier that was able to demonstrate stereophonic sound effects with 5! channels working with valves. For the years '60 the stereophonic sound demonstrations were very rare. Hugo gave over 1500 demonstrations all over the Netherlands and quited with the stereophonic sound demonstrations as soon as it became a common system ± 1970. The stereoscopic demonstrations went on up to 1985.
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Dutch 3D society projector 'Stereofiel' |
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| For the international stereoscopic convention in 1975
at Wageningen in the Netherlands, Hugo build a new and
more sophisticated projector for stereoscopic projection
only. The main slide carrier could hold several slide
adapters with different slide frame formats. These
adapters could easy be changed. The projector could hold
projection lenses with different focal lengths accompanied
with their own focal length condenser lenses. So the condenser lenses were
exchangeable and in the light
compartment moveable for an optimal light beam through
small or large slides formats. For medium format (60x60
mm.) slides, the total light condenser system had to be
replaced. To keep the slide cool (38 degrees Celsius), a
second polarization filter was placed between the slide
and the second condenser lens. This new system cooling
system was developed by Hugo. Also new was the simple
height correction of the lenses. It turned both lenses
round a virtual central point between the lenses causing a
height difference of the projected image. In front of the
projection lenses big round turn able polarizing filters
were mounted to switch between stereo and pseudo stereo
presentation. This was necessary for fast solving the
problem of faulty placed slides during presentations. In
front of the projection lenses it was possible to mount a
manually controlled fade over system. Specifications: Design: ± 1975 The name Stereofiel was introduced by Hugo. The projector was sold in 1980 to the Dutch stereoscopic society. Only one has been made.
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H. de Wijs series projector |
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| The projector was made in series. It was a smaller
model compared to the previous projectors. The smaller
fan caused the totally smaller size. The features are
comparable with the previous projector. Some models
carried the over dimensioned transformer inside the
projector, causing the projector to be very heavy. The
models are especially suited for 60x60 mm. or maximum
40x40 mm. slides only. Only one was capable of handling
all formats, that became Hugo's own model. Specifications: Design: ± 1977 The projectors were fully made by hand and very labour intensive, that made the projector expensive. The production came to an end when the full automatic RBT projector came to the market.
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Unfinished 'super' hand operated stereo projector |
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| A friend of Hugo, Huib Heikoop in the
Netherlands who has as hobby metal manufacturing, had
seen the projection results of Hugo and wanted to build
one for his own. Together they decided to design and
build the most perfect 3D projector (optically). The condenser and lens system are the same as previous 1979
projectors but the front part with the different focal length lenses were fixed in two revolving disks. This
system made it possible to exchange the lenses very fast.
Both revolving disks could be moved for height and base
corrections. The turn able polarizing filters are placed
in front of the lenses including a fade-over system. Specifications: Design: ± 1980 (10 years project)
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Half frame stereo projection for large distances |
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| For projecting half frame stereoscopic
slides with one projector on a big screen, Hugo designed
a projection system with mirrors. The Kodak Carousel 3D
lens of Hugo, was not able to project images larger than
1 meter high. The cause was the small projection lens and
the loss of light. Now the standard projection lens was
used and the two half frame polarizing filters were
placed between the slide and the second condenser lens.
Each half frame slide is reflected on one surface mirror
placed in front of the projector. Both mirrors are
adjustable, one in height, the other in base. The
reflected light beams are projected backwards passing the
projector on the screen over each other. This system
doesn't loose light and makes it possible to project 2
meters high. specifications: Design: ± 1994
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Solving the polariod glasses problem |
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| Permanent stereoscopic projection for
exhibitions is always a problem when using Polaroid spectacles. To avoid loss of 3D spectacles, you always
need someone to give and collect them. By mounting two
strips of polarization filter material vertically between
two glass plates which are mounted between two thick
bars, you force the spectator to look between the bars,
straight through the two polarizing strips to the
projected image. |
