Triplet Loupe with Light
Great Optics with LED. A very practical sized magnifier. Unique and only available at The Loupe Store.
- 10x magnification
- Triplet optics
- 20 mm lens diameter
- Dimensions: 9.0 cm long, 3.3 wide, 1.5cm thickness
- Powered by two 1.5V AAA batteries (not included)
You need to hold the loupe up closely to your eye. Then, bring the specimen you wish to inspect up into its focal-distance:
Chromatic aberration is caused by a lens having a different refractive index for different wavelengths of light (lens dispersion), meaning that different colors focus at different distances from the lens. Longitudinal and lateral chromatic aberration of a lens can be seen as "fringes" of color around the image.
Chromatic aberration of a single lens causes different wavelengths of light to have differing focal lengths.
An achromatic doublet has the same focal length for red and blue light.
As can be seen above, chromatic aberration can be minimized by using an Achromatic Lens or Achromat, in which special optical materials with differing dispersion are assembled together to form a compound lens.