Product Descriptions :
Characteristics: | Projector used Fresnel Lens |
| Shape: | Rectangle |
| Color: | Transparent |
| Dimension(mm): | 2, 2.4, 2.69, 3.5 , 4, 4.3, 5, 5.8 inches available |
| Thickness(mm): | 0.65-1.5mm |
| Substrate: | PMMA acrylic |
| Remark：support customized | |
What is Projector Fresnel Lens?
- From a structural perspective, the surface of the Fresnel lens is in concentric circles form that gradually increase in size and gradually deepen from the inside out, resembling a series of zigzag patterns. From a cross-sectional view, it appears as a series of zigzags. The top arc of each zigzag is composed of circular arcs of the same size. Besides, It can also be designed with symmetrical zigzags arranged in vertical columns. Such designs are generally for curtain-type passive infrared detectors, which have a small detection angle.
- By cutting a circular-shaped Fresnel lens into small pieces with regular patterns of arrangement to form a multi-layer multi-view area Fresnel lens, the more view areas there are, the larger the detection angle (if only using a thermoluminescent infrared sensor for detection, the detection angle will not exceed 180 degrees). The more horizontal view areas there are, the smaller the detection angle in the horizontal direction will be, and the more accurate the detection will be, with fewer blind areas. The same principle applies, such as the more vertical layers there are, the more detection stages there will be (generally, a wide-angle Fresnel lens design can detect long distances, medium distances, and short distances. When designing, it is usually designed as 4-5 layers).
What is typical application for Projector Fresnel Lens?
Projector Fresnel lenses serve as ultra-thin optical components that efficiently collect, collimate, and focus light. As a result, they find wide application in various projection systems, including overhead projectors, LCD/DLP/LED digital projectors, short-throw and ultra-short-throw projectors, rear-projection TVs, and portable mini projectors.
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