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HMPQP/HMPZP
Diameter φD
Thickness t
Material
Surface Flatness PV
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It is a substrate polished to high precision were 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.

Related product
Products
Technical Data
Documents/Downloads
Guide

▶Zerodur® is a registered trademark of SCHOTT AG.
▶CLEARCERAM® is a registered trademark of Ohara Corporation.
▶Wedge substrates are also available that can be used to prevent the influence of back reflection (WSB / WSSQ / WSSQK).
W3141

Attention

▶When used as a Newton test plate, it may scratch the sample if used improperly. If inspecting an object that is easily scratched, use a laser interferometer.
▶The number of Newton rings is approximately twice the value of the PV result of analysis by interferometer.
▶Optical flats are not coated in order to maintain the surface accuracy. If you need a coating, please contact to our Sales Division.
▶If there is a crack or chipping visible on the edges of an optical flats, the damage may have reduced the surface flatness. Please do not use damaged optical flats as they should be replaced.

Reference

▶A Newton ring is a rainbow-colored fringes that can be observed when the sample is adhered with optical flat. It is possible to estimate the flatness of the sample surface from the shape and number of this fringes.

Common Specifications
MaterialSynthetic fused silica
Low Expansions glass (ZERODUR® or CLEARCERAM®-Z)
Parallelism<3′
Surface Quality
(Scratch-Dig)
20-10
Rear surfacePolished
Clear aperture95% of the diameter
Outline Drawing

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Reference

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Newton's Rings
Spec
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Part Number
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    JP Yen Stock Qty
HMPQP-30C10-6
HMPQP-30C10-12
HMPQP-30C10-20
HMPQP-40C10-6
HMPQP-40C10-12
HMPQP-40C10-20
HMPQP-50C10-6
HMPQP-50C10-12
HMPQP-50C10-20
HMPQP-60C12-6
HMPQP-60C12-12
HMPQP-60C12-20
HMPQP-80C15-6
HMPQP-80C15-12
HMPQP-80C15-20
HMPQP-100C20-6
HMPQP-100C20-12
HMPQP-100C20-20
HMPZP-100C17-6
HMPZP-100C17-12
HMPZP-100C17-20
HMPQP-130C25-6
HMPQP-130C25-12
HMPQP-130C25-20
HMPZP-130C20-6
HMPZP-130C20-12
HMPZP-130C20-20
HMPQP-150C30-6
HMPQP-150C30-12
HMPQP-150C30-20
HMPZP-150C25-6
HMPZP-150C25-12
HMPZP-150C25-20

φ30mm

10mm

Synthetic fused silica

λ/6

φ30mm

10mm

Synthetic fused silica

λ/12

φ30mm

10mm

Synthetic fused silica

λ/20

φ40mm

10mm

Synthetic fused silica

λ/6

φ40mm

10mm

Synthetic fused silica

λ/12

φ40mm

10mm

Synthetic fused silica

λ/20

φ50mm

10mm

Synthetic fused silica

λ/6

φ50mm

10mm

Synthetic fused silica

λ/12

φ50mm

10mm

Synthetic fused silica

λ/20

φ60mm

12mm

Synthetic fused silica

λ/6

φ60mm

12mm

Synthetic fused silica

λ/12

φ60mm

12mm

Synthetic fused silica

λ/20

φ80mm

15mm

Synthetic fused silica

λ/6

φ80mm

15mm

Synthetic fused silica

λ/12

φ80mm

15mm

Synthetic fused silica

λ/20

φ100mm

20mm

Synthetic fused silica

λ/6

φ100mm

20mm

Synthetic fused silica

λ/12

φ100mm

20mm

Synthetic fused silica

λ/20

φ100mm

17mm

Low expansion glass

λ/6

φ100mm

17mm

Low expansion glass

λ/12

φ100mm

17mm

Low expansion glass

λ/20

φ130mm

25mm

Synthetic fused silica

λ/6

φ130mm

25mm

Synthetic fused silica

λ/12

φ130mm

25mm

Synthetic fused silica

λ/20

φ130mm

20mm

Low expansion glass

λ/6

φ130mm

20mm

Low expansion glass

λ/12

φ130mm

20mm

Low expansion glass

λ/20

φ150mm

30mm

Synthetic fused silica

λ/6

φ150mm

30mm

Synthetic fused silica

λ/12

φ150mm

30mm

Synthetic fused silica

λ/20

φ150mm

25mm

Low expansion glass

λ/6

φ150mm

25mm

Low expansion glass

λ/12

φ150mm

25mm

Low expansion glass

λ/20

RoHS  

¥27,000

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RoHS  

¥31,000

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RoHS  

¥41,500

LOW
RoHS  

¥33,000

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RoHS  

¥39,000

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RoHS  

¥52,000

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RoHS  

¥46,000

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RoHS  

¥54,000

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RoHS  

¥72,000

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RoHS  

¥62,000

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RoHS  

¥72,000

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RoHS  

¥96,000

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RoHS  

¥77,000

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RoHS  

¥90,000

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RoHS  

¥121,000

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RoHS  

¥97,000

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RoHS  

¥137,000

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RoHS  

¥176,000

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RoHS  

¥103,000

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RoHS  

¥121,000

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RoHS  

¥159,000

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RoHS  

¥191,000

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RoHS  

¥225,000

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RoHS  

¥269,000

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RoHS  

¥154,000

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RoHS  

¥181,000

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RoHS  

¥225,000

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RoHS  

¥247,000

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RoHS  

¥291,000

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RoHS  

¥363,000

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RoHS  

¥206,000

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RoHS  

¥242,000

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RoHS  

¥309,000

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