The 2001 rotary viewer went down several changes compared to the previous model, although it kept its robustness and high quality of viewing. Below a summary is given of it's features:

• Primary used in museums and exhibitions.
• High quality lenses which allows 90% of the spectators to experience bright illuminated stereoscopic slides. (there is allways a minority having problems with viewing anyway meaning poor eyes).
• The slide frames are mounted on a revolving stable aluminum drum as well as a paper text card besides it.
• By pressing a button, the spectator is able to control when to view a picture.
• Changes to the settings of rotary viewer makes it possible to let the viewer turn to the first slide position after not using the viewer. Or change the automatic shut off time of the light.
• A parallel port interface on the back of the viewer allows it to connect to a computer. A program interacts with the viewer and the CD-ROM player. So a pre-programmed program can be executed after pressing the front button.
• The behavior of the rotary viewer can be totally changed according to the program. Besides the parallel port interface a second contact closure interface is located at the back of the viewer, allowing language selection for example. (see image below)

• The rotary viewer actually consists of two parts. the first part is the actual rotary viewer with all it's mechanical parts and the second part is the front plate under an angle of 45 degrees and the cover. The rotary viewer is able to operate without the front plate and the cover as well. This allows exhibition designers to integrate the viewer with the exhibition interior.

Construction

The base of the rotary viewer is its frame inside, it is made of 2 mm. thick stainless steel. It gives the total viewer the necessary stability. The slides are mounted on a ball beared cast aluminum drum. This guarantees the alignment of the slides with regards to the lenses. The lens tubes are made of stainless steel for an extra long life time. The acid (sweat) from hands and eye's will not affect the metal, so the front part of the lens will keep its smooth surface. The dc motor, that revolves the drum, has metal gears and a high torque although the load is low. The tension on the belt that drives the drum won't decrease because of its strengthened threads inside although it can wear out. A guarantee is given for 5 years on the mechanical construction and 1 year on the electronical parts.

41x101 mm. (RBT) slide format configuration

model 01-01-A

When the rotary viewer is configured for this format, the drum can hold 21 slides. The maximum picture size to be viewed is equal to the maximum standardized format for 41x101 mm. slides; 24x 33 mm. Besides that it is possible to view slides with a height of 28 mm. The Frame thickness should be at least 2.5 mm. thick like the RBT frames as well as the glass mounted frames. A Steel spring keeps the slide frame on its place and in focus. The focal distance of the lenses is in total 60 mm. with an aperture of 36 mm. This allows most spectators to see the picture sharp up to the corners even for spectacle wearers.

2x 50x50 mm. (2x2") slide format configuration

model 01-01-B

When the rotary viewer is configured for this format, the drum can hold 17 slides. The maximum picture format is 36x36 mm. allowing horizontal and vertical slides to be viewed. The slide frame thickness should be at least 2,5 mm. thick. Inserting the slides goes a little different with regards to coupled pairs. A steel spring for every slide in the middle of the drum keeps the slides on a distance of 12 mm. giving a pupil distance of 62 mm. The focal distance of the lenses is in total 60 mm. with an aperture of 36 mm. This allows most spectators to see the picture sharp up to the corners even for spectacle wearers.

60x130 mm. (medium) slide format configuration

SOLD OUT, NOT AVAILABLE ANYMORE.

model 01-01-C

When the rotary viewer is configured for this format, the drum can hold 14 slides. The maximum picture format is 55x55 mm. The shown mask is available at de Wijs. The slide frame thickness should be at least 2,5 mm. thick. commonly used with glass mounted slides. The focal distance of the lenses is 100 mm. with an aperture of 32 mm. The front of the viewer is extended due to the optical demands of this format.

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Look here for the manual