Help with Ball Lenses specifications:
Performance
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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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| 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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| Radius of Curvature | If a lens's curvature was extrapolated into a sphere, the radius of that sphere is the radius of curvature for that lens. | ||
| 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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| Diameter / Length | Diameter of the lens if viewed straight on; could also be thought of as the length. | ||
| 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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| 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. | ||
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Materials
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| Materials | Glass tends to reflect in the infrared range. | ||
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| BK7 Glass | BK7 is boro-crown glass (borosilicate glass). A glass with an Abbe v-value of 64. It generally has an index of refraction of 1.51. | ||
| Crown Glass | One of the two principal types of optical glass, the other being flint glass. Crown glass is harder than flint glass, and has a lower index of refraction and lower dispersion. Both types are used in the production of compound lenses. A glass with an Abbe v-value larger than 50 or 55, depending on its index. It generally has an index of refraction of 1.495-1.54. | ||
| Flint Glass | One of the two major types of optical glass, the other being crown glass. Flint glass is softer than crown glass, has a higher dispersion and usually a higher refractive index. A glass with an Abbe v-value of 35-40. It generally has an index of refraction of 1.595-1.64. | ||
| LaSFN9 Glass | LaSFN9 is dense lanthanum flint (borosilicate or silico-borate glasses with RE oxides). A glass with an Abbe v-value of 27-50. It generally has an index of refraction of >1.80. | ||
| SF5 Glass | SF5 is dense flint glass (alkaline silicate glasses with > 47% wt. PbO). A glass with an Abbe v-value of <35. It generally has an index of refraction of >1.63. | ||
| SF11 Glass | SF11 is dense flint glass (alkaline silicate glasses with > 47% wt. PbO), Higher quality than SF5. A glass with an Abbe v-value of <35. It generally has an index of refraction of >1.63. | ||
| Acrylic | Acrylic lenses have 92% transmission in the visible spectrum. | ||
| Amorphous Polyolefin (Zeonex®) | Zeonex® lenses have 92% transmission in the visible spectrum. They have high stiffness and high temperature resistance. | ||
| Polycarbonate | Polycarbonate Lenses have 85%-91% transmission in the visible spectrum. | ||
| Polystyrene | Polystyrene Lenses have 87%-92% transmission in the visible spectrum. | ||
| Calcium Fluoride | Calcium Fluoride lenses exhibits excellent transmission from 150nm through 7000nm. | ||
| Germanium | Germanium lenses exhibit excellent transmission in the infrared from 2000nm to 4000nm. | ||
| Sapphire | Sapphire has a very broad transmission range extending from 150 nm to 6000nm. Its great hardness and resistance to chemical attack and thermal shock allow it to be used in environments where other less costly components would not be suitable. | ||
| Zinc Selenide | Zinc Selenide exhibits excellent transmission from .69μm to 18μm. | ||
| UV Grade Fused Silica | UV grade fused silica offer improved transmission in the ultraviolet region compared with crown glass. | ||
| Other | Any other non-glass, non-plastic lens material. | ||
| 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 Surface
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| Surface Quality: | Surface quality of the lens. | ||
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| 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. | ||
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| 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. | ||
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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. | ||
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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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