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Category
Maker
Object type
Place
Material
Date

"Introscope" in box

1950-1975

Subminiature Foucault knife-edge tester

1950-1975

Radius measurer, plus older two-lamp radius gauge

1950-1975

Micro-monochromator

1950-1975
One of two profile gauges with concave profile which was used by the 3rd Earl of Rosse to measure the 72 inch mirrors used on the largest Rosse telescope.

Profile gauge with concave profile

1844-1845
Two profile gauges, concave and convex which were used by the 3rd Earl of Rosse to measure the 72 inch mirrors used on the largest Rosse telescope.

Two profile gauges

1844-1845
Two optical pinholes, plus test lamps, overhang adjustment, box of turrets

Two optical pinholes

1950-1975
Catadioptric collimator, aperture 2.4 inches

Catadioptric collimator, aperture 2.4 inches

1950-1975
Three Dall null testers on two stands, plus lamp and box of accessories

Three Dall null testers on two stands

1950-1975
One of two profile gauges with convex profile which was used by the 3rd Earl of Rosse to measure the 72 inch mirrors used on the largest Rosse telescope.

Profile gauge with convex profile

1844-1845
Two self-marking Knife-edge Foucault testers, plus microlens light source, bag of optical tubes, box of accessories, box of extending arms, box of "oddments"

Two self-marking Knife-edge Foucault testers

1950-1975