Chart comparison unit, type C.Y.5 no. 13
1945-1954
Binocular bifocal periscope
Glass roof prism from artillary range-finder
1920-1950
'Roof' type glass prism from artillery range-finder
1930-1950
Narrowband interference filter
1973
Narrowband interference filter
1973
FT27 rangefinder
1914
Lens type PS 0120001 polished and anti-reflection coated by Barr and Stroud Ltd.
1986
Prism type LF 2349 optically 'smoothed' (lapped) by Barr and Stroud Ltd.
1986
Circular graded spectrum interference filter (140mm dia)
1970-1973
FT37 rangefinder
1939-1945
FF3 rangefinder, by Barr and Stroud
1916
Rough ground blank for mfr. of prism type LF 2349
1986
Uncoated, polished germanium disc by Barr and Stroud Ltd.
1980-1986
Coated, polished germanium disc by Barr and Stroud Ltd.
1980-1986
Germanium lens
1980-1986
Beam-splitter glass prisms from artillery range-finder
1912-1950
Achromatic deviation glass prism from artillary range-finder
1930-1950
Model showing mounting method for glass roof prism
1920-1950
FT37 rangefinder
1939-1945
Glass pressing for manufacture of lens type PS 0120001 by Barr and Stroud Ltd.
1986
Glass pressing for mfr. of lens type OS 0120006 by Barr and Stroud Ltd.
1986
Lens type PS 0120006 polished and A/R coated on one face by Barr and Stroud Ltd.
1986
Prism type LF 2349 as generated on Blanchard surface grinder by Barr and Stroud Ltd.
1986
Prism type LF 2349 optically polished by Barr and Stroud Ltd.
1986
Four channel colour separation prism system for television camera
1986
sectioned pair of prismatic binoculars
1934
Strip of graded spectrum interference filter
1970-1973
7x50 binocular with internal filters model CF41 serial number 12648 by Barr & Stroud
1940
Erecting prism, from artillary range-finder
1912-1950
'Porro' type optical system taken from field glass binoculars
1930-1950
Radar telescope for GL3 radar
1952
Arrangement of gear wheels
circa 1948
Specimens showing stages in cutting an optical prism
Two FT37 rangefinders by Barr and Stroud Ltd
1939-1945
Manually-operated cassette changer for cerebral angiography complete with ten cassettes
1960-1970
Cassette for manually-operated cassette changer
1960-1970
Cassette for manually-operated cassette changer
1960-1970
Cassette for manually-operated cassette changer
1960-1970
Cassette for manually-operated cassette changer
1960-1970
Cassette for manually-operated cassette changer
1960-1970
Narrowband interference filter
1973
Narrowband interference filter
1973
Cassette for manually-operated cassette changer
1960-1970
Barr and Stroud Range finder
Binocular bifocal periscope
PHOTONYMOGRAPH MoS Type PN4 (For Map Symbols and Lettering) by Barr & Stroud
1958
Manually-operated cassette changer for cerebral angiography
1960-1970
Cassette for manually-operated cassette changer
1960-1970
Narrowband interference filter
1973