High resolution lenses for machine vision — standard and custom lens design
Universe Options Include Diopter Adjustment
High Resolution Lenses for machine vision, instrumentation, inspection and vibration-sensitive applications. Standard and custom hi-res lens assemblies.
Diopter
To measure the optical power of a lens, a diopter is necessary. The diopter captures and measures the power and expresses it in the form of a reciprocal focal length. The higher the measurement the diopter captures, the closer the focal length; in some cases a close focal length setting will be expressed in a negative number and this would indicate a greater distance being captured. As an example, a five-diopter lens will capture light and be able to focus at a distance of one-fifth of a meter. Diopter measurements are captured in meters because metric measurements are the normal rate of measure in optics fields.
During the manufacture and development of mirrors and curved lenses the shape will determine where the focus will lie. In corrective lenses and eyeglasses the diopter is the number that is necessary to correct an individuals’ vision. Following an eye examination, the optometrist will design a lens that will either increase or decrease the focal length necessary to correct the vision impairment and allow the individual to see more clearly. Individuals that require a two-diopter lens would be considered slightly farsighted and will need a lens designed to shorten the focal length to allow light to hit the correct part of the patient’s eye.
Magnification specialties also utilize diopters. Consider that items such as binoculars, telescopes, cameras and other pieces of equipment that require individuals to look through an optical device need to be focused for that individual user and diopters are the measurement utilized for the adjustments. Laser focusing also utilizes diopter adjustment technology.
The diopter unit of measurement is not a widely adapted standard system in fields other than for optics researchers, technicians and optics developers. These professionals use the diopter measurement because it is an industry standard. The diopter unit of measurement is typically noted as d or dpt and is typically expressed in quarter measurements such as -2.25 d or + 1.25 dpt.
Universe manufactures and stocks 10, 15 and 20x wide field eyepieces to fit the standard 23mm tube diameter. Some options include diopter adjustment and indicating needles.