Year/Period |
1940-1947 |
Maker |
BLEEKER |
Country |
The Netherlands |
Signature |
SM 255.1: NEDOPTIFA / 12× / UTRECHT |
Category |
Other optical equipment |
Subcategory |
Magnifying glasses |
Optical 1 |
Simple |
Optical 2 |
Achromatic |
Size of the instrument (h x w x d) |
Length 7.4 × diameter 2.3 cm |
Donated by |
P.P. de Bruijn, Zeist, the Netherlands |
Inventory number |
SM 255 |
Two achromatic magnifiers with handle. Both magnifiers carry the brand Nedoptifa from Utrecht.
One magnifying glass has a magnification of 12× and a diameter of 2.0 cm. The lens is screwed on a holder. The focal length is approx. 2.0 cm. This magnifying glass is in excellent condition. It carries the inscription NEDOPTIFA / 12× / UTRECHT.
The second magnifier has a magnification of 10× and a diameter of 2.3 cm. Its length is 7.4 cm. The lens is screwed on a holder; one screw is missing. The focal length is approx. 2.4 cm. The glass of the lens is slightly affected. It carries the inscription NEDOPTIFA / 10× / UTRECHT.
Both magnifiers originate from the Bleeker collection of Peter Paul de Bruijn.
Universal refractometer after Abbe
BLEEKER
1950-1955
Porro prism binocular 6×24
BLEEKER
ca. 1950
Porro prism binocular 6×30
BLEEKER
ca. 1953
Grating spectroscope
BLEEKER
1950-1960
info@stichtinghistorischemicroscopie.nl
Visseringlaan 25
2288 ER Rijswijk
The Netherlands
RSIN: 804217361
KVK: 41182753
IBAN: NL53INGB0007728414
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