Geoscience Reference
In-Depth Information
known to generate eye strain (Leroy et al.
2012
), and in some cases possibly eye
trauma, particularly where children are concerned. Moreover, with respect to very
distant buildings, stereoscopic vision cannot improve relief perception (Howard
and Rogers
1995
). So our preference went to a monoscopic vision instead of a
stereoscopic one.
Accommodation
Accommodation breaks can prove to be a strain on the eyes (Benjamin
2007
).
Keeping this in mind we preferred images of building and information balloons to
be in the same accommodation plane. Therefore we decided to make a film of the
landscape and to insert information balloons in the same plane. This is the advan-
tage of the video see-through.
3.3.2 Design
Affordance
We wanted the use of our telescope to be easily and readily understood by the public
at large, and quality of affordance was consequently of paramount importance to us.
Security
Nobody wants to be responsible for causing injuries to people's hands or other bodily
parts, especially children. But we are in non surveyed public places, so we decided not
to tempt fate and have holes present in our device where hands might get caught in.
Counterbalancing
Telescopes can prove to be heavy and at times awkward to handle and we wanted
its movements and weight to be counterbalanced. Moreover, it seemed desirable to
keep down the velocity of its movements hydraulically.
4 Details of Our System
4.1 Mechanical Architecture
Our aim was to produce a telescope presenting a very good affordance, and we
accordingly elected to design it in a most traditional fashion.
