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Spectroscope apparatus for Solar spectrum research

Spectroscope apparatus for Solar spectrum research

1839-1860
Rock salt prism used in pioneering work on the infra-red spectrum, 1920-1940

Rock salt prism used in pioneering work on the infra-red spectrum, 1920-1940

circa 1930
John Browning’s, 1875 'Popular' single prism student spectroscope, with case

John Browning’s, 1875 'Popular' single prism student spectroscope, with case

1875
Prism for AGA Thermovision 680

Prism for AGA Thermovision 680

1977
Prism of Thallium glass on wooden plinth

Prism of Thallium glass on wooden plinth

1865-1875
Microscope Prism

Microscope Prism

1900-1910
Hollow Prism of natural quartz with mounting lug on base

Hollow Prism of natural quartz with mounting lug on base

1900-1905
Spectro-prisms, used by Horace Dall

Spectro-prisms, used by Horace Dall

Spectro-prisms, used by Horace Dall

Spectro-prisms, used by Horace Dall

Equilateral prism

Equilateral prism

1900-1980
Potassium Bromide prism for IR wavelengths

Potassium Bromide prism for IR wavelengths

1945-1955
Lenses and prisms, boxed

Lenses and prisms, boxed

Equilateral prism

Equilateral prism

1900-1980
Centre separating prism for Barr and Stroud rangefinder

Centre separating prism for Barr and Stroud rangefinder

1920
'Barred' type glass optical field-prism

'Barred' type glass optical field-prism

1920-1950
Fused Silica Prism by Adam Hilger Ltd.

Fused Silica Prism by Adam Hilger Ltd.

1900-1905
Prism type LF 2349 optically polished by Barr and Stroud Ltd.

Prism type LF 2349 optically polished by Barr and Stroud Ltd.

1986
Model of the 'Porro' erecting system for binoculars

Model of the 'Porro' erecting system for binoculars

1930-1950
Watson and Sons, Right Angle Prism

Watson and Sons, Right Angle Prism

Model showing mounting method for glass roof prism

Model showing mounting method for glass roof prism

1920-1950
Rough ground blank for mfr. of prism type LF 2349

Rough ground blank for mfr. of prism type LF 2349

1986
Wedge-shaped glass prism with variable density tint

Wedge-shaped glass prism with variable density tint

1930-1950
'Fresnel' type circular glass biprism

'Fresnel' type circular glass biprism

1920-1950
Small wedge-shaped glass prism

Small wedge-shaped glass prism

1920-1950
Fused Silica Prism (compound - 4 segments) by Adam Hilger Ltd.

Fused Silica Prism (compound - 4 segments) by Adam Hilger Ltd.

1900-1905
'Half-penta' type glass erecting prism

'Half-penta' type glass erecting prism

1920-1950
Glass triangular astrolable prism

Glass triangular astrolable prism

1930-1950
two-prism spectroscope, with accessories, in case (damaged), made by Browning, London, c.1890.

Two-prism spectroscope

1885-1895
Binocular spectroscope apparatus by Spencer and Son, Dublin, 1874. Two parallel spectroscopes each with a prism in wooden mount), in a wooden case. The spectroscope was taken by the Transit of Venus Expedition to the Cape of Good Hope in 1874-75. It is probably unique.

Binocular spectroscope apparatus with case

1874
four-prism spectroscope (only two prisms present), by J. Duboscq of Paris, France, c. 1870. It was used by the third Marquis of Salisbury, British Prime Minister four times between 1885 and 1902, an enthusiastic amateur scientist.

Four-prism spectroscope

1865-1875
Polished prism which forms part of a persicope sight, by Chance-Pilkington, St. Asaph,Clwyd, Wales, 1980.

Polished prism which forms part of a persicope sight

1980
Automatic spectroscope by G. and S. Merz (unsigned). Two micrometer slits in a mahogany box, drum of each divided into 100 parts. a) Sorby eyepiece in box by "A Hilger London", with position micrometer; 1 small screw missing, in mahogany box. Spectroscope is heavily constructed, height about 16", diam. of plate 12 1/2", 6 prisms, 3 eyepieces with washleather cover at eye end

Automatic spectroscope by G. and S. Merz (unsigned)

Uranium glass prism angle 60 degrees, length 84 mm, height 47.5 mm

Uranium glass prism angle 60 degrees

Equilateral prism, flint glass, by Ladd, London, c.1872

Equilateral prism

1872
Two prisms for spectrometer: One rock salt, one potassium bromide, in glass dessicator with dessicant; prisms cut from single crystals, c.1960

Two prisms for spectrometer

right-handed quartz prism, by Adam Hilger Ltd., used by the late Col. J. W. Gifford with case.

right-handed quartz prism

Calcite Prism, in case, by Adam Hilger Ltd., used by the late Col. J. W. Gifford, c. 1902

Calcite Prism

Optically worked prism in borosilicate crown glass, by Chance-Pilkington, St. Asaph,Clwyd, Wales, 1980.

Optically worked prism in borosilicate crown glass

1980
Wedge-shaped glass prism, one of two, with a neutral density tint increasing towards the thicker end, unsigned, European, 1930-1950.

Wedge-shaped glass prism with variable density tint

1930-1950
Brass astronomical spectroscope from Norman Lockyer Observatory with eleven prism train in two fitted wooden cases.

Brass astronomical spectroscope

1870-1890
Two wedge-shaped glass prisms, with a neutral density tint increasing towards the thicker end, unsigned, European, 1930-1950.

Two wedge-shaped glass prisms with variable tint

1930-1950
Selection of components from the three prism Oxford Solar Spectroscope made by Casella Limited with optical components from Adam Hilger Ltd. for the University Observatory, Oxford in 1938. Parts include two large 60 º prisms, one prism stand and the collimator objective lens.

Selection of components from the three prism Oxford Solar Spectroscope made by Casella Limited

1938
Two large 60 º glass prisms made by Adam Hilger Limited for the three prism Oxford Solar Spectroscope. These were replacements for the original prisms supplied in 1938 but apparently were never used as the instrument was replaced by a spectrograph using a grating.

Two large 60 º glass prisms

1940-1950
Triangular prism of dense glass; faces 1 1/4 inches square, refracting angle 60 degrees

Triangular prism of dense glass; faces 1 1/4 inches square

Complementary prisms of flint and crown glass

Complementary prisms of flint and crown glass

Slit and prisms (2) used in the first form of microscope for spectroscopic work.

Slit and two prisms, from spectroscopic microscope

Two 'roof' type glass prisms (90-degree of refraction), defective, from artillary dial-sights, (a) old type with mounting groove (c.1912) and (b) modern type (1940-1950), both unsigned, British.

Two 'roof' type glass prisms from artillary dial-sights

1940-1950
Optically worked prism in high lead silicate flint glass (Refractional index = 1.805. V = 25.4), by Chance-Pilkington, St. Asaph,Clwyd, Wales, 1980.

Optically worked prism in high lead silicate flint glass (Refractional index = 1.805. V = 25.4)

1980