Help with Gradient Index Lenses specifications:
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. | ||
Center 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. | ||
Edge Thickness | The thickness of the lens at its edge. | ||
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. | ||
Lens Surface
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Surface Quality: | Surface quality of the lens. | ||
Your choices are... | |||
10-5 Scratch / Dig | A dig is a defect on a polished optical surface that is nearly equal in terms of its length and width. A scratch is a defect on a polished optical surface whose length is many times its width. 10/5 indicates the average diameter of the digs to be .05 mm and the average length of a scratch is .10 mm. | ||
20-10 Scratch / Dig | A dig is a defect on a polished optical surface that is nearly equal in terms of its length and width. A scratch is a defect on a polished optical surface whose length is many times its width. 20/10 indicates the average diameter of the digs to be .10 mm and the average length of a scratch is .20 mm. | ||
40-20 Scratch / Dig | A dig is a defect on a polished optical surface that is nearly equal in terms of its length and width. A scratch is a defect on a polished optical surface whose length is many times its width. 40/20 indicates the average diameter of the digs to be .20 mm and the average length of a scratch is .40 mm. | ||
60-40 Scratch / Dig | A dig is a defect on a polished optical surface that is nearly equal in terms of its length and width. A scratch is a defect on a polished optical surface whose length is many times its width. 60/40 indicates the average diameter of the digs to be .40 mm and the average length of a scratch is .60 mm. | ||
80-50 Scratch / Dig | A dig is a defect on a polished optical surface that is nearly equal in terms of its length and width. A scratch is a defect on a polished optical surface whose length is many times its width. 80/50 indicates the average diameter of the digs to be .50 mm and the average length of a scratch is .80 mm. | ||
Other | Any other scratch/dig rating not listed. | ||
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. | ||
Surface Flatness: | The surface flatness of the plate lens, given in terms of λ(λ=633nm). | ||
Your choices are... | |||
λ/2 | The biggest variation in surface height for the lens is no more than λ/2 (λ=633nm). | ||
λ/4 | The biggest variation in surface height for the lens is no more than λ/4 (λ=633nm). | ||
λ/5 | The biggest variation in surface height for the lens is no more than λ/5 (λ=633nm). | ||
λ/8 | The biggest variation in surface height for the lens is no more than λ/8 (λ=633nm). | ||
λ/10 | The biggest variation in surface height for the lens is no more than λ/10 (λ=633nm). | ||
λ/20 | The biggest variation in surface height for the lens is no more than λ/20 (λ=633nm). | ||
Other | Any other surface flatness. | ||
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. | ||
Lens Features
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Antireflection Coating | Lenses have an antireflective coating. | ||
Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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. | ||
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. | ||
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. | ||