Optical Flat / HMPQP_HMPZP
It is a substrate polished to high precision where material change of the shape is very small due to the temperature variation. It can be used as test plates of the interferometer and the Newton test plate.
Inspection data of interferometric surface accuracy is provided with the optical flats.You can select the required optical flat from our range of products listed by various sizes and surface accuracy.
In the high-precision and large size optical flats, a material having a lower thermal expansion than synthetic fused silica is used.
Arrow on the side of the component indicates the surface that is polished to the high surface accuracy.
Optical flat are delivered in case for storage.
Common Specifications
| Material | Synthetic fused silica Low-expansion glass(ZERODUR® or CLEARCERAM®-Z) |  |
|---|---|---|
| Parallelism | ＜3′ | |
| Surface Quality (Scratch-Dig) | 20 - 10 | |
| Clear Aperture | 95% of the diameter Surface flatness λ/40 in 90% of actual aperture |
| Outline Drawing | Reference image Newton ring |
|---|---|
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| Standard Type | ||||
|---|---|---|---|---|
| Part Number | Diameter φD | Thickness t |
Material | Surface Flatness PV |
| HMPQP-30C10-6 | φ30mm | 10mm | Synthetic fused silica | λ/6 |
| HMPQP-30C10-12 | φ30mm | 10mm | Synthetic fused silica | λ/12 |
| HMPQP-30C10-20 | φ30mm | 10mm | Synthetic fused silica | λ/20 |
| HMPQP-40C10-6 | φ40mm | 10mm | Synthetic fused silica | λ/6 |
| HMPQP-40C10-12 | φ40mm | 10mm | Synthetic fused silica | λ/12 |
| HMPQP-40C10-20 | φ40mm | 10mm | Synthetic fused silica | λ/20 |
| HMPQP-50C10-6 | φ50mm | 10mm | Synthetic fused silica | λ/6 |
| HMPQP-50C10-12 | φ50mm | 10mm | Synthetic fused silica | λ/12 |
| HMPQP-50C10-20 | φ50mm | 10mm | Synthetic fused silica | λ/20 |
| HMPQP-60C12-6 | φ60mm | 12mm | Synthetic fused silica | λ/6 |
| HMPQP-60C12-12 | φ60mm | 12mm | Synthetic fused silica | λ/12 |
| HMPQP-60C12-20 | φ60mm | 12mm | Synthetic fused silica | λ/20 |
| HMPQP-80C15-6 | φ80mm | 15mm | Synthetic fused silica | λ/6 |
| HMPQP-80C15-12 | φ80mm | 15mm | Synthetic fused silica | λ/12 |
| HMPQP-80C15-20 | φ80mm | 15mm | Synthetic fused silica | λ/20 |
| HMPQP-100C20-6 | φ100mm | 20mm | Synthetic fused silica | λ/6 |
| HMPQP-100C20-12 | φ100mm | 20mm | Synthetic fused silica | λ/12 |
| HMPQP-100C20-20 | φ100mm | 20mm | Synthetic fused silica | λ/20 |
| HMPZP-100C17-6 | φ100mm | 17mm | Low-expansion glass | λ/6 |
| HMPZP-100C17-12 | φ100mm | 17mm | Low-expansion glass | λ/12 |
| HMPZP-100C17-20 | φ100mm | 17mm | Low-expansion glass | λ/20 |
| HMPQP-130C25-6 | φ130mm | 25mm | Synthetic fused silica | λ/6 |
| HMPQP-130C25-12 | φ130mm | 25mm | Synthetic fused silica | λ/12 |
| HMPQP-130C25-20 | φ130mm | 25mm | Synthetic fused silica | λ/20 |
| HMPZP-130C20-6 | φ130mm | 20mm | Low-expansion glass | λ/6 |
| HMPZP-130C20-12 | φ130mm | 20mm | Low-expansion glass | λ/12 |
| HMPZP-130C20-20 | φ130mm | 20mm | Low-expansion glass | λ/20 |
| HMPQP-150C30-6 | φ150mm | 30mm | Synthetic fused silica | λ/6 |
| HMPQP-150C30-12 | φ150mm | 30mm | Synthetic fused silica | λ/12 |
| HMPQP-150C30-20 | φ150mm | 30mm | Synthetic fused silica | λ/20 |
| HMPZP-150C25-6 | φ150mm | 25mm | Low-expansion glass | λ/6 |
| HMPZP-150C25-12 | φ150mm | 25mm | Low-expansion glass | λ/12 |
| HMPZP-150C25-20 | φ150mm | 25mm | Low-expansion glass | λ/20 |
| Higt Precision Type | ||||
|---|---|---|---|---|
| Part Number | Diameter φD | Thickness t |
Material | Surface Flatness PV |
| HMPQP-30C10-40 | φ30mm | 10mm | Synthetic fused silica | λ/40 |
| HMPQP-40C10-40 | φ40mm | 10mm | Synthetic fused silica | λ/40 |
| HMPQP-50C10-40 | φ50mm | 10mm | Synthetic fused silica | λ/40 |
| HMPQP-60C12-40 | φ60mm | 12mm | Synthetic fused silica | λ/40 |
| HMPQP-80C15-40 | φ80mm | 15mm | Synthetic fused silica | λ/40 |
| HMPQP-100C20-40 | φ100mm | 20mm | Synthetic fused silica | λ/40 |
| HMPQP-130C25-40 | φ130mm | 25mm | Synthetic fused silica | λ/40 |
| HMPQP-150C30-40 | φ150mm | 30mm | Synthetic fused silica | λ/40 |
| HMPZP-150C25-40 | φ150mm | 25mm | Low-expansion glass | λ/40 |
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