Which lens is used in solar panels?

Solar Concentrator Fresnel lenses are shaped like a dart board, with concentric rings of prisms around a lens that's a magnifying glass. All of these features let them focus scattered light from the Sun into a tight beam.  Solar Concentrator Fresnel lenses are favorable from the weight and cost aspects and may find uses in current applications. A Fresnel lens is divided into a number of zones, the spacing of which can be as small as a few tenths of a millimeter to several centimeters. Within each aperture zone the surface of the lens is tilted so that it refracts light at the same angular amount as a normal spherical lens of the same focal length. In general, these lens facets are flat, but with tilted surfaces since the effect of curvature would be neg­ligible in affecting the image size. If the facets were a significant portion of the aperture radius and larger than the desired focal image size, then cur­vature of the facets would be necessary.

HOW DO SOLAR CONCENTRATORS WORK?

A solar concentrator uses lenses, called Fresnel lenses, which take a large area of sunlight and direct it towards a specific spot by bending the rays of light and focusing them. Some people use the same principle when they use a magnifying lens to focus the Sun's rays on a pile of kindling or paper to start fires. A solar concentrator uses lenses, called Fresnel lenses, which take a large area of sunlight and direct it towards a specific spot by bending the rays of light and focusing them. Some people use the same principle when they use a magnifying lens to focus the Sun's rays on a pile of kindling or paper to start fires. Solar concentrators put one of these lenses on top of every solar cell. This makes much more focused light come to each solar cell, making the cells vastly more efficient. Concentrators work best when there is a single source of light and the concentrator can be pointed right at it. This is ideal in space, where the Sun is a single light source. The solar concentrators also have the advantage that the solar cells can be spaced farther apart since light can be focused on each cell. This means fewer solar cells need to be made and the panels cost less to construct. In addition, engineers can now put thick glass or plastic over the solar panel to protect it from micrometorites, something they would have a hard time doing if they had to worry about allowing enough light to reach the solar cells.

Circular Fresnel Lenses

Fresnel lenses make good concentrating lenses for small solar energy applications, especially the circular ones. For example, the concentrators being tested with silicon and gallium arsenide solar cells are generally the circular Fresnel type. The choice is made in part for their low cost, but also since high concentrations can be obtained from a precision plastic lens, with brightness concentrations exceeding 2000. In these applications it is necessary to track the sun to keep the small solar image centered on the receptor element.

Application of A Solar Concetrator

• Focusing action

• Widely used in solar Concentrator,LED light

• Also be suitable for Solar energy collector system, start a fire under sunlight, hot water heater, solar furnace

FEATURES & ADVANTAGES OF SOLAR CONCENTRATOR LENS

• 92% High light transmittance

• Custom made available

• Almost 40 years’ professional production and design

• High quality and competitive price

• CE, ROHS, Factory Audit, ISO9001 

• Good after-sales service