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Other optical equipment

In addition to microscopes, the Foundation’s collection also includes other historical optical equipment such as binoculars, refractometers, magnifying glasses, spectroscopes, and polarimeters. A special part of the collection is focused on Nedoptifa/Bleeker; a Dutch company that produced such devices including microscopes during the 20th century. We have chosen to categorise optical equipment as a separate group.

The descriptions of the various devices are regularly added to as more information about them becomes available.

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Hemoglobin meter

REICHERT

1870-1880

Butter refractometer after Wolney

ZEISS

ca. 1891

Polarimeter tubes

1900-1950

Trial lens kit

ONBEKEND/UNKNOWN

ca. 1900

Folding magnifier 8×

BUSCH

1900-1930

Telescope

ONBEKEND/UNKNOWN

1900-1930

Folding magnifier

ONBEKEND/UNKNOWN

1920-1950

Achromatic stand magnifier

LEITZ

1925-1950

Polarimeter after Laurent

WINKEL

1928-1940

Spectroscope

ZEISS

1930-1940

Achromatic magnifier 8×

BLEEKER

1940-1955

Cytometer

BLEEKER

1940-1960

Folding hand magnifier

BLEEKER

1940-2017

Achromatic magnifier 12× and 10×

BLEEKER

1940-1947

Achromatic magnifier 12×

BLEEKER

1940-1950

Spectroscope

BLEEKER

1946-1950

Universal refractometer after Abbe

BLEEKER

1950-1955

Refractometer/saccharimeter

BLEEKER

1950-1960

Achromatic magnifier 10×

BLEEKER

1950-1960

Universal refractometer after Abbe

BLEEKER

1950-1960

Porro prism binocular 6×24

BLEEKER

ca. 1950

Porro prism binocular 6×30

BLEEKER

ca. 1950

Porro prism binocular 6×24

BLEEKER

ca. 1950

Refractometer or Saccharimeter opened

BLEEKER

1950-1960

Universal refractometer after Abbe

BLEEKER

1950-1960

Viewer cathetometer

BLEEKER

1950-1960

Porro prism binocular 6×30

BLEEKER

ca. 1950

Universal refractometer after Abbe

BLEEKER

1950-1960

Refractometers/saccharimeters

BLEEKER

1945-1965

Monochromator with adjustable filter

ZEISS

1950-1965

Magnifier

OLDELFT

ca. 1950

Porro prism binocular 7×50

BLEEKER

ca. 1953

Porro prism binocular 6×30

BLEEKER

ca. 1953

Thread counter

BLEEKER

1955-1965

Thread counter

BLEEKER

1955-1965

Spectroscope

BLEEKER

ca. 1960