Prism

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OBJECT TYPE
N/A
DATE
1980
ARTIFACT NUMBER
2008.1845.002
MANUFACTURER
Zeiss, Carl
MODEL
Sketchmaster
LOCATION
Jena, German Democratic Republic

More Information


General Information

Serial #
N/A
Part Number
2
Total Parts
43
AKA
N/A
Patents
N/A
General Description
Unknown

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length
N/A
Width
N/A
Height
N/A
Thickness
N/A
Weight
N/A
Diameter
N/A
Volume
N/A

Lexicon

Group
Exploration and Survey
Category
Photogrammetry
Sub-Category
N/A

Manufacturer

AKA
Zeiss
Country
German Democratic Republic
State/Province
Unknown
City
Jena

Context

Country
Unknown
State/Province
Unknown
Period
Used throughout the 1980s. Utilisé à travers les années 1980.
Canada
Used for mapping in the Northwest Territories by Indian and Northern Affairs. The revision and completion of maps by the direct plotting of topographical details from vertical and low oblique aerial photographs, is one of the tasks most frequently occurring for topographical purposes. Utilisé en cartographie par les Affaires autochtones et du Nord Canada. L'actualisation et l'achèvement des cartes par pointage de cartes de détails topographiques venant de photographes aériennes verticales ou photographie oblique basse sont l'une des tâches les plus fréquentes dans le champ de topographie.
Function
The most essential part of the apparatus is the double prism with a semi-silvered surface which, when viewed obliquely permits the photograph and the map to be observed simultaneously. The photograph for this purpose is fixed to an orientatable photoboard which, together with the prism housing, can be set at various heights above the map situated on the table. By tilting the photograph and altering the distance ratio between prism and photograph on the one side, and prism and map on the other side, it can be so arranged that the observer can so manipulate the superimposed image of the photograph on the map to match corresponding details, and thereby fix its position; the revision details are then traced directly onto the map. Le partie le plus essentiel de cet appareil est le double prisme avec une surface demi-argentée qui, lorsque vu de biais, permet que la photographe et la carte peuvent être observées de façon simultanée. La photographe dans ce cas si est fixé sur le tableau de photo orientable qui, avec le prisme, peut être ajustée à différentes hauteurs au-dessus de la carte située sur la table. En inclinant la photographe et modifiant le ratio de distance entre le prisme et la photographe d'un côté, et le prime et la carte de l'autre côté, on peut faire en sorte que l'observateur peut manipuler l'image super-imposée de la photographe sur la carte appairée les détails correspondants et les détails de révision sont tracés directement sur la carte.
Technical
The horizontal arm carries the prism head. It can be moved in the guide-head in a horizontal direction and fixed in position by means of the clampscrew. By this movement one arranges the change in the distance between the prism-head and photocarrier so that the viewing scale of the aerial-photograph can be varied. Le bras horizontal transporte la tête du prisme. Il peut être bougé par le guide dans une direction horizontale et fixée en position grâce à une vis de pression. Avec ce mouvement, on connaît le changement dans la distance entre la tête du prisme et le porteur de photographe pour faire en sorte que l'échelle d'expression du convertisseur peut être variée.
Area Notes
Unknown

Details

Markings
N/A
Missing
Appears complete.
Finish
Double glass prism with a semi-silvered surface. The upright portion of the prism has black numbering against a white background. Prisme à double verre avec une surface demi-argentée. La partie montant du prisme à de la numération noire contre un arrière-plan blanc.
Decoration
N/A

CITE THIS OBJECT

If you choose to share our information about this collection object, please cite:

Zeiss, Carl, Prism, circa 1980, Artifact no. 2008.1845, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/item/2008.1845.002/

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