K9 Single-Sided Optical Flats — GFH11 Series
From $55 USD
Request a quoteProduct description
GFH11 K9 single-sided optical flats have one precision-ground and polished optical surface with high flatness. They serve as reference flats for assessing flatness errors and wringing performance of other highly finished surfaces.
The source states that each optical flat is precision-ground and tested using a Zygo interferometer to verify surface accuracy.
K9 optical glass offers high transmission over 350–2000 nm. The source describes high hardness, resistance to physical and chemical effects, and low bubble and impurity content, making it suitable as a substrate for optical components.
Supplier schematic
S1 is polished and S2 is ground. Dimensions retain the supplier drawing; reference only.
Product drawings are for reference only. Actual products may have dimensional deviations; the drawings must not be used for manufacturing.
The common category specification states a diameter tolerance of +0.2 mm, while the individual model rows state ±0.2 mm. Both supplier statements are retained; refer to the model row for the selected part.
General specifications
Specifications common to this series. Refer to the individual model rows for model-specific values.
- Material
- Fine-annealed H-K9L optical glass
- Surface quality
- 60-40
- Surface flatness
- λ/10 or λ/20 at 633 nm
- Parallelism
- <1 arcmin
- Diameter tolerance
- +0.2 mm
- Thickness tolerance
- See model specification table
- Protective chamfer
- 0.2–0.5 mm × 45°
- Coating
- Uncoated
- S1 surface
- Polished
- S2 surface
- Fine-ground
Available specifications
USD unit prices. Shipping, taxes and dispatch timing are confirmed with your quotation. Select models and quantities to build your quote list.
16 models
Choose comparison fields
Compare up to four fields. Expand a model to read every specification.
Dia. = diameter. Units remain shown in each heading.
| Details | Quote | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| GFH11-0254-1-0 | λ/20 at 633 nm | <1 arcmin | φ25.4 mm | 12.7 mm | ±0.2 mm | ±1 mm | $77 | ||
| GFH11-0508-1-0 | λ/20 at 633 nm | <1 arcmin | φ50.8 mm | 12.7 mm | ±0.2 mm | ±1 mm | $140 | ||
| GFH11-0762-1-0 | λ/20 at 633 nm | <1 arcmin | φ76.2 mm | 19.1 mm | ±0.2 mm | ±1 mm | $203 | ||
| GFH11-1016-1-0 | λ/20 at 633 nm | <1 arcmin | φ101.6 mm | 19.1 mm | ±0.2 mm | ±1 mm | $607 | ||
| GFH11-1524-1-0 | λ/20 at 633 nm | <1 arcmin | φ152.4 mm | 25.4 mm | ±0.2 mm | ±2 mm | $1,756 | ||
| GFH11-2032-1-0 | λ/20 at 633 nm | <1 arcmin | φ203.2 mm | 38.1 mm | ±0.2 mm | ±2 mm | $2,556 | ||
| GFH11-2540-1-0 | λ/20 at 633 nm | <1 arcmin | φ254 mm | 38.1 mm | ±0.2 mm | ±2 mm | $4,278 | ||
| GFH11-3048-1-0 | λ/20 at 633 nm | <1 arcmin | φ304.8 mm | 38.1 mm | ±0.2 mm | ±2 mm | $8,634 | ||
| GFH11-0254-2-0 | λ/10 at 633 nm | <1 arcmin | φ25.4 mm | 12.7 mm | ±0.2 mm | ±1 mm | $55 | ||
| GFH11-0508-2-0 | λ/10 at 633 nm | <1 arcmin | φ50.8 mm | 12.7 mm | ±0.2 mm | ±1 mm | $109 | ||
| GFH11-0762-2-0 | λ/10 at 633 nm | <1 arcmin | φ76.2 mm | 19.1 mm | ±0.2 mm | ±1 mm | $156 | ||
| GFH11-1016-2-0 | λ/10 at 633 nm | <1 arcmin | φ101.6 mm | 19.1 mm | ±0.2 mm | ±1 mm | $467 | ||
| GFH11-1524-2-0 | λ/10 at 633 nm | <1 arcmin | φ152.4 mm | 25.4 mm | ±0.2 mm | ±2 mm | $1,478 | ||
| GFH11-2032-2-0 | λ/10 at 633 nm | <1 arcmin | φ203.2 mm | 38.1 mm | ±0.2 mm | ±2 mm | $2,007 | ||
| GFH11-2540-2-0 | λ/10 at 633 nm | <1 arcmin | φ254 mm | 38.1 mm | ±0.2 mm | ±2 mm | $2,380 | ||
| GFH11-3048-2-0 | λ/10 at 633 nm | <1 arcmin | φ304.8 mm | 38.1 mm | ±0.2 mm | ±2 mm | $4,512 | ||
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Technical notes
Review the material, dimensions and other specifications listed for the individual model. Check any available curves against the model's stated operating range.
Illustrations and printable specification summaries are reference information, not manufacturing drawings. Confirm technical suitability and final requirements with your quotation.
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