Year/Period |
1940-2017 |
Maker |
BLEEKER |
Country |
The Netherlands |
Signature |
SM 247.1: PLANACHROOM / 8× / BLEEKER ZEIST // MADE IN HOLLAND / NOI [in logo] |
Category |
Other optical equipment |
Subcategory |
Magnifying glasses |
Optical 1 |
Compound |
Size of the instrument (h x w x d) |
3.6 × 2.1 × 1.3 cm |
Donated by |
P.P. de Bruijn, Zeist, the Netherlands |
Inventory number |
SM 247 |
Six foldable pocket loupes, with a magnification of 5×, 8×, 10×, 12× en 16×.
The four metal Bleeker magnifiers are doublets, the Rubin magnifier is a triplet.
| Brand | Bleeker | Bleeker | Bleeker | Nedoptifa | Bleeker | R. Rubin |
| Catalogue number | SM 247.5 | SM 247.1 | SM 247.2 | SM 247.3 | SM 247.4 | SM 247.6 |
| Place | Zeist | Zeist | Zeist | Utrecht | Zeist | Antwerpen |
| Magnification | 5× | 8× | 10× | 12× | 16× | 10× |
| Material | plastic | metal | metal | metal | metal | metal |
| Diameter lens (cm) | 2.2 | 1.6 | 1.4 | 1.1 | 0.9 | 1.7 |
| Focal length (cm) | 5.0 | 3.0 | 2.5 | 2.0 | 1.5 | 2.5 |
| Dimensions: | ||||||
| length (cm) | 4.0 | 3.6 | 3.3 | 3.3 | 2.8 | 3.0 |
| width (cm) | 2.8 | 2.1 | 1.7 | 1.7 | 1.5 | 2.1 |
| depth (cm) | 1.3 | 1.3 | 1.3 | 1.1 | 0.9 | 1.9 |
Magnifier
OLDELFT
ca. 1950
Porro prism binocular 6×30
BLEEKER
ca. 1950
Universal refractometer after Abbe
BLEEKER
1950-1955
Porro prism binocular 6×30
BLEEKER
ca. 1950
info@stichtinghistorischemicroscopie.nl
Visseringlaan 25
2288 ER Rijswijk
The Netherlands
RSIN: 804217361
KVK: 41182753
IBAN: NL53INGB0007728414
The Historical Microscopy Foundation is independent and non-commercial. Your support is vital to enable the Foundation to fulfil its mission and to guarantee its continuity. We are very grateful for all financial contributions, as well as donations of progress objects for the collection.
Donate