Help with Fresnel Lenses specifications:
Fresnel Lens Specifications
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| Fresnel Lens Specifications | Fresnel lenses can either be positive if converging or negative if diverging. | ||
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| Positive Lens | A fresnel lens with a positive focal length. | ||
| Negative Lens | A fresnel lens with a negative focal length. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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| Lens Application: | Lens application refers to the desired wavelength range for the lens. This wavelength range is mostly dependent upon the lens material. | ||
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| Infrared | Lenses are designed for use in the 750 nm to 2500 nm wavelength range. | ||
| Visible | Lenses are designed for use in the 380 nm to 750 nm wavelength range. | ||
| Ultraviolet | Lenses are designed for use in the 4 nm to 380 nm wavelength range. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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Performance
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| Focal Length | The effective focal length is the distance from the lens the light converges. Focal lengths are positive for a converging system and negative for a diverging system. | ||
| Search Logic: | User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria. | ||
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| Grooves: | Fresnel lens use concentric grooves to focus light. The number of grooves is measured by grooves per millimeter. | ||
| Search Logic: | All matching products will have a value greater than or equal to the specified value. | ||
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| Thickness: | The thickness of the lens at its center. | ||
| Search Logic: | User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria. | ||
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Lens Features
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| Laser / Heat Resistant | Lenses are rated for use with lasers or are heat resistant. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Microoptic | Suppliers describe the optic as a micro-optic or miniature optic. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Mounted | Optics come already mounted. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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