When.com Web Search

Search results

1. Results From The WOW.Com Content Network

2. Magnifying glass - Wikipedia

   en.wikipedia.org/wiki/Magnifying_glass

   Magnifying glasses typically have low magnifying power: 2×–6×, with the lower-power types being much more common. At higher magnifications, the image quality of a simple magnifying glass becomes poor due to optical aberrations, particularly spherical aberration. When more magnification or a better image is required, other types of hand ...

3. Magnification - Wikipedia

   en.wikipedia.org/wiki/Magnification

   The maximum angular magnification (compared to the naked eye) of a magnifying glass depends on how the glass and the object are held, relative to the eye. If the lens is held at a distance from the object such that its front focal point is on the object being viewed, the relaxed eye (focused to infinity) can view the image with angular ...

4. Dermatoscopy - Wikipedia

   en.wikipedia.org/wiki/Dermatoscopy

   There are two main types of dermatoscopes, hand held portable and stationary mounted type. A hand held dermatoscope is composed of a transilluminating light source and a magnifying optic (usually a 10-fold magnification). There are three main modes of dermatoscopy: [2] Nonpolarized light, contact ; Polarized light, contact

5. Binoculars - Wikipedia

   en.wikipedia.org/wiki/Binoculars

   Binoculars concentrate the light gathered by the objective into a beam, of which the diameter, the exit pupil, is the objective diameter divided by the magnifying power. For maximum effective light-gathering and brightest image, and to maximize the sharpness, [27] the exit pupil should at least equal the diameter of the pupil of the human eye ...

6. Loupe - Wikipedia

   en.wikipedia.org/wiki/Loupe

   A photographic loupe for examining film and prints. A loupe (/ ˈ l uː p / LOOP) is a simple, small magnification device used to see small details more closely. [1] They generally have higher magnification than a magnifying glass, and are designed to be held or worn close to the eye.

7. Eyepiece - Wikipedia

   en.wikipedia.org/wiki/Eyepiece

   Blue light, seen through an eyepiece element, will not focus to the same point but along the same axis as red light. The effect can create a ring of false colour around point sources of light and results in a general blurriness to the image. One solution is to reduce the aberration by using multiple elements of different types of glass.