Home
Product Catalog
News
Contact Us

Product Catalog 

Flatness detector

  • Flatness detector
  • Flatness detector
  • Flatness detector
Model No.︰WS-M5型
Country of Origin︰China
Minimum Order︰1 pc
Share on:

 Total 19 Related Items 
Prev56789Next

Product Description

OPTIONAL FEATURES - OPTICAL FLATS & MONOCHROMATIC LIGHT

Optical flats are optical-grade, lapped and polished glass pieces

which are extremely flat (about 25 nanometres). They are used in

combination with a monochromatic light to determine the flatness

of the lapped valve seat or disc. When the valve seat or disc and

optical flat are placed under the monochromatic light, the surface is

illuminated and the light waves reflect off both the bottom surface

of the flat and the surface of the seat. The reflected waves interfere,

creating a pattern of interference fringes (Newton’s rings), visible

as light and dark bands. The spacing between the fringes is smaller

where the gap is changing more rapidly, indicating a departure from

flatness in one of the two surfaces, in a similar way to the contour

lines on a map. A flat surface is indicated by a pattern of straight,

parallel fringes with equal spacing, while other patterns indicate

uneven surfaces. Two adjacent fringes indicate a difference in

elevation of one-half wavelength of the light used, so by counting

the fringes differences in elevation of the surface can be measured to

millionths of an inch. The delivery includes a laminated poster with

operating instructions and indicative guidelines of levels of flatness.

Product Image




Related Products
Self-adhesive sandpaper
Self-adhesive sandpaper
Round self-adhesive sandpaper
Round self-adhesive sandpaper
Abrasive Block Kit
Abrasive Block Kit
Lapping agent
Lapping agent




Home  |  Product Catalog  |  News  |  Contact Us  |  Sitemap  |  Mobile Version
  简体版     繁體版     English

Powered by DIYTrade.com  Build your FREE website !