|
Our range of Biological microscopes includes
- Routine microscope
- Research microscopes
FOR All TECHNIQUES including brightfield, darkfield,
phase contrast, fluorescence.
See below for information on:
marking on objectives
coloured objective rings
marking on eyepieces
MARKING
OF OBJECTIVES
| 40/0.65 |
Magnification/Numerical aperture |
| 160 |
Mechanical tube length in mm (for finite tube
length objectives) |
| ∞ |
Infinity corrected objectives |
| /0 |
Corrected for use with uncovered specimens |
| /0.17 |
Corrected for cover glass 0.17mm thickness |
| OIL |
Oil immersion objective |
| W |
Water immersion objective |
| GLYC |
Glycerol immersion objective |
| PH2 |
Phase Contrast objective - the number denotes the
required condenser ring |
| POL |
For polarising (strain free) |
| EPI |
For Epi- illumination (metallurgical microscopes) |
| D |
For Epi-illumination darkfield and brightfield
objectives |
| DIC |
For Differential Interference Contrast |
| L |
Long working distance objective (Working distance
usually given in mm) |
| PLAN |
Flat field |
| APO |
Apochromat correction - no such markings indicate
achromat objective (intermediate corrections are usually marked with
manufacturer's designation e.g. Fluotar |
COLOURED RINGS ON OBJECTIVES DENOTE MAGNIFICATION
| Black |
Grey |
Brown |
Red |
Orange |
Yellow |
Light green |
Dark green |
Light Blue |
White |
| 1x/1.25x |
1.6x/2x |
2.5x/3.2x |
4x/5x |
6.3x/8x |
10x/12.5x |
16x/20x |
25x/32x |
40x/50x |
100x/125x/160x |
MARKING
OF EYEPIECES
| 10x/20 |
Magnification/Field of view number |
| Drawing of spectacles |
High eyepoint suitable for spectacle wearers |
| C |
Compensating type |
| Circle with cross inside |
Built-in centered cross line (usually eyepiece has
locating pin |
| 
