Index of Refraction
Prism
Total Reflection
Dispersion
Shadow Line
LED Light Source
LED Beam Forming
Polarizer
Refractometer
PE-0700 Abbe Refractometer
Light path of Abbe's refractometer
The light of the green LED is collimated, polarized and guided by the deflection mirror (A) to the refraction prism via the lens (2). The lens (2) creates a divergent beam in such a way that the hypotenuse of the prism is illuminated under different angles of incidence. All rays having an angle of incidence greater than the critical angle of total reflection are leaving the prism, whereas the other are deflected and imaged via the lens (2) and the deflection mirror (B) to the translucent screen. Since parts of the beam are cut off, the initial round beam shows a clear dark area. The critical angle of total reflection depends on the index of refraction outside the prism. If a liquid or other optical transparent material is applied to the hypotenuse of the prism, this angle changes and with it the position of the dark to bright line of the half shade image, allowing the determination of the index of refraction of the applied material.Description of the components and modules
The green emitting LED (3) is connected to the adaptive controller (2) which recognizes the type of the LED and automatically sets the operation limits accordingly. The emitted light is collimated by the achromat (9) to an almost parallel beam. The polarizer (10) is used to improve the contrast of the dark-bright line of the half shade image. The deflection mirror assembly (12) guides the light into the refraction prism assembly. It contains a lens to create divergent light. Another lens images the beam via the deflection mirror assembly(13) to the translucent screen (6). The test liquid (1) is applied to the top of the refraction prism.Item | Code | Qty. | Description |
---|---|---|---|
1 | CA-0010 | 1 | Set of test liquids |
2 | DC-0020 | 1 | LED and Photodiode Controller |
3 | LQ-0220 | 1 | Green LED in ø C25 housing |
4 | MM-0028 | 1 | Mounting plate C25-S with angle gradation |
5 | MM-0034 | 1 | Mounting plate C30 on carrier MG20 |
6 | MM-0110 | 1 | Translucent screen on carrier MG20 |
7 | MM-0420 | 1 | Four axes kinematic mount on carrier MG20 |
8 | MP-0150 | 1 | Optical Bench MG-65, 500 mm |
9 | OC-0140 | 1 | Achromat f=40 mm in C30 mount |
10 | OC-0710 | 1 | Polarizer in C25 mount |
11 | OM-0460 | 1 | Refraction prism assembly |
12 | OM-0462 | 1 | Deflection mirror unit, left |
13 | OM-0464 | 1 | Deflection mirror unit, right |
14 | UM-PE07 | 1 | Manual Abbe Refractometer |
Media Type | Title | File Size [MBytes] | Action |
---|---|---|---|
PE-0700 Abbe Refractometer Version 2022 |
6.47 MB | Download | |
Catalogue Page | |||
JPEG, PNG, SVG | Pictures | ||
MP4 | Video |