SIGMAKOKI

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Custom-made
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We will fabricate custom substrates to your request of shape, size, reflected wavefront and transmitted wavefront with high precision. Production of large-diameter optical grade polishing to 300mm diameter maximum is available. We can also provide special processing, such as drilling hole or rectangular shape.

◦A data of transmitted wavefront measurement or reflected wavefront by the interferometer is provided.
◦We offer a selection of substrates made from various low-expansion material suitable to the required accuracy and environment of your use.
◦Thin film coatings are also available on the master optics. However, depending on the type of coating it we may not be able to guarantee the surface flatness.

Related product
Products
Technical Data
Documents/Downloads
Guide

▶Optical flats (HMPQP / HMPZP) that has been standardized by the reflecting surface flatness are available.
W3145
▶Optical flats (OFPXP) with surface flatness of λ/10 and less φ150mm are available.
W3151

Attention

▶Surface flatness may not be guaranteed if coating is applied to master optics.
▶Due to the difficulty in procurement of the materials and processing conditions, lead-time may be longer, please check with our Sales Division for accurate delivery.
▶If the holder is fixed to the master optics, by tightening screws too strongly, or the use of curable adhesives the surface flatness may be reduce on the master optics.

Common Specifications
Maximum Diameterφ300mm
Thickness50 - 38mm (The approximate 1/6 to 1/8 of the diameter)
Clear aperture90% of the diameter
MaterialSynthetic fused silica , Low expansion glass
Surface flatness λ/10 (Vary in thickness and outer diameter.)
Surface flatness data (reference data)

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