Help with Optical Flats specifications:
Optical Flat Geometry
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| Optical Flat Shape: | Flats can either come round, square, or rectangular. | ||
| Your choices are... | |||
| Circular | The flat is circular shaped. | ||
| Square | The flat is square shaped. | ||
| Rectangular | The flat is rectangular shaped. | ||
| 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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| Diameter, Square Side, or Rectangular Length: | If the flat is circular, the diameter. If the flat is square, the length of a side. If the flat is rectangular, the length of its longest side. | ||
| 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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| Rectangular Width: | If the flat is rectangular, the length of its shorter side. | ||
| 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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| Thickness: | The thickness of the flat. | ||
| 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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Optical Flat Materials
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| The functionality of the optical flat is dependent upon the material it’s made of, especially thermal stability. | |||
| Your choices are... | |||
| Fused Silica | Fused silica has good long-term thermal stability and mechanical accuracy. | ||
| Pyrex® | Pyrex® has excellent thermal stability and is economical for one-sided applications. Pyrex is a registered trademark of the Corning Corporation. | ||
| UV grade Fused Silica | UV grade fused silica has good long-term thermal stability and mechanical accuracy, better then fused silica. | ||
| Zerodur® | A clear glass ceramic with extremely high thermal stability. Zerodur is a registered trademark of Schott Glass Technologies, Inc. | ||
| Other Optical Flat Material | Any other optical flat material not mentioned. | ||
| Search Logic: | Products with the selected attribute will be returned as matches. Leaving or selecting "No Preference" will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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Optical Flat Features
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| Coating: | Some flats are coated to increase transmission of light. | ||
| Your choices are... | |||
| None | Flat has no coating. | ||
| Antireflective | Flat has an antireflective coating. | ||
| Search Logic: | Products with the selected attribute will be returned as matches. Leaving or selecting "No Preference" will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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| Wedged? | A slight wedge can virtually eliminate internal fringes. | ||
| 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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Optical Flat Surface
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| Surface Quality: | Surface quality of the optical flat's working surface. | ||
| 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 surface quality rating. | ||
| 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 optical flat, given in terms of λ(λ=633nm). | ||
| Your choices are... | |||
| λ/2 | The greatest variation in surface height for the flat is no more then λ/2 (λ=633nm). | ||
| λ/4 | The greatest variation in surface height for the flat is no more then λ/4 (λ=633nm). | ||
| λ/5 | The greatest variation in surface height for the flat is no more then λ/5 (λ=633nm). | ||
| λ/8 | The greatest variation in surface height for the flat is no more then λ/8 (λ=633nm). | ||
| λ/10 | The greatest variation in surface height for the flat is no more then λ/10 (λ=633nm). | ||
| λ/20 | The greatest variation in surface height for the flat is no more then λ/20 (λ=633nm). | ||
| Other | Any other surface flatness in terms of λ(λ=633nm) | ||
| 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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