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Doe And Hope
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Mid 20thC WWII Period Parabolic Concave Mirror
The mid-century concave parabolic mirror, etched ‘No. 617’ and ‘optical focus 5.3 inches’, having a bronzed metal encasement, and surviving from World War II Period England.
The condition is completely untouched, and no damage is present. There is wear to the finish as one would expect, and natural foxing and spotting to the glass which is very attractive. The reverse shows some Patent numbers and marks which are mainly undecipherable.
A parabolic mirror is a concave mirror that has the form of a paraboloid of revolution so that rays emanating from the geometrical focus and reflected from the surface are all parallel to each other and to the axis of symmetry and rays from a distant source are reflected to the focus and that is used in reflecting telescopes, searchlights, and headlights.
This example is probably from a World War Two anti-aircraft searchlight or ships signal as between the World Wars, before the invention of radar, parabolic sound mirrors were used experimentally as early-warning devices by military air defence forces to detect incoming enemy aircraft by listening for the sound of their engines.
One can have a lot of fun with this a highly decorative fragment of optical wonderment.
SellerDoe And Hope
View all stock from
Doe And Hope
Private dealer, By appointment only
The Onion Barn, Shoe Cottage,
15 High Street, Blunham,
Bedfordshire, MK44 3NL.
MK44 3NL
Tel : 07729 213013
Non UK callers : +44 7729 213013
Get directions to Doe And Hope
The condition is completely untouched, and no damage is present. There is wear to the finish as one would expect, and natural foxing and spotting to the glass which is very attractive. The reverse shows some Patent numbers and marks which are mainly undecipherable.
A parabolic mirror is a concave mirror that has the form of a paraboloid of revolution so that rays emanating from the geometrical focus and reflected from the surface are all parallel to each other and to the axis of symmetry and rays from a distant source are reflected to the focus and that is used in reflecting telescopes, searchlights, and headlights.
This example is probably from a World War Two anti-aircraft searchlight or ships signal as between the World Wars, before the invention of radar, parabolic sound mirrors were used experimentally as early-warning devices by military air defence forces to detect incoming enemy aircraft by listening for the sound of their engines.
One can have a lot of fun with this a highly decorative fragment of optical wonderment.
Price The price has been listed in British Pounds.
Conversion rates as of 12/NOV/2024. Euro & Dollar prices will vary and should only be used as a guide.
Always confirm final price with dealer. Free UK shipping.
Category Antique Mirrors
Date c.1940-50
1940s Antiques Material Glass
Origin English
Item code as155a1886 / 1970
Status Sold
£350.00 
$446.74 
€421.05 
$
€
Conversion rates as of 12/NOV/2024. Euro & Dollar prices will vary and should only be used as a guide.
Always confirm final price with dealer. Free UK shipping.
View all stock from
Doe And Hope
Private dealer, By appointment onlyThe Onion Barn, Shoe Cottage,
15 High Street, Blunham,
Bedfordshire, MK44 3NL.
MK44 3NL
Tel : 07729 213013
Non UK callers : +44 7729 213013
Get directions to Doe And Hope
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