Fond IND-IIA-F047 - Stereoscope

1 instrument

The instrument was transferred from IIA library to IIA Archives

The instruments were acquired from Kodaikanal Solar Observatory

This item was a optical instrument named as Stereoscope. Stereoscopes are apparently those optical devices that help to view the two images separately and with relaxed eyes. There are two types of stereoscopes as: lens or pocket stereoscopes and mirror stereoscopes. Lens or pocket stereoscopes are great for viewing the whole overlap area of prints up to 9 cm × 13 cm or parts of larger patterns. On the other hand, mirror stereoscopes were designed to accept standard 23 cm × 23 cm metric air photos and work well with A4/US letter-sized prints. Most models come with magnifying options up to eight times, which is pretty impressive. One cool thing about mirror stereoscopes is that they are large enough to allow the analyst to draw beneath them, so it is possible to trace objects identified in the stereoview with a pen onto one of the images or a transparent overlay. However, it's important to remember that this sketch wouldn't have the geometric properties of a map as it contains all distortions present in the base image.

This item transferred to the IIA archives have been preserved

Further accruals are expected

Arranged roughly by events

Researchers must sign IIA Archival access agreement

Copyright is retained by IIA Archives

• Inggris

• Latin

Instrument is in good condition

The originals were located in IIA Archives

The original files are transferred to Bangalore campus, then processed and archived

Archival description is based on ISAD(G), second edition.

• Inggris

• Latin

Processed by IIA Archives