Jump to content
Free downloads from TNA ×
The Great War (1914-1918) Forum

Remembered Today:

Astigmatic binoculars


KizmeRD

Recommended Posts

I recently came across a passing reference to the usage of ‘astigmatic binoculars to make submarines more visible’ in a book discussing early anti U-boat measures. Does anyone know more about how these worked, and why they might have been better than using ordinary binoculars when searching for U-boats on the surface? I couldn’t find anything about this on the internet.

MB

Link to comment
Share on other sites

  • Admin

There would appear to be a school of thought that astigmatic conditions may increase contrast sensitivity - thus making it easier to detect a surface object?

Modern research appears to  debunk that when the astigmatic condition is binocular (both eyes) rather than monocular (single eye).

(PDF) Effects of astigmatic defocus on binocular contrast sensitivity (researchgate.net)

I haven't yet found anything specific to ww1 yet.

Link to comment
Share on other sites

Thank you David, for verifying that there’s at least some logic and science behind the idea that astigmatic binoculars may have provided greater optical sensitivity in particular circumstances, so at least its conceivable that their use may have been trialed during WW1 as a possible tool for U-boat detection. I just need to discover some contemporary documentary evidence now that will confirm this.

MB

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
×
×
  • Create New...