Binary amplitude gratings made from periodic chromium lines on glass for optical modulation, diffraction experiments and custom instruments.
Alternating opaque and clear regions modulate transmitted amplitude. Pitch, duty cycle and illuminated aperture determine the geometric pattern; diffraction efficiency also depends on wavelength, illumination and the optical setup.
Use a periodic chrome pattern to modulate light for sensing or an optical reference. Choose a Ronchi target when the main task is a standard periodic focus or imaging test.
An amplitude grating modulates transmitted intensity with clear and opaque stripes. A phase grating instead changes optical phase through relief or refractive-index structure. Similar periods do not make their efficiency or diffraction behaviour interchangeable.
Period, duty cycle, stripe direction, active area and reference marks can be combined; the useful wavelength and illumination determine how the grating is used.
A patterned glass reference component with the selected graduations, outline and mounting dimensions, accompanied by the specified inspection records.
| Period and duty cycle | Specify clear width and repeat spacing independently |
|---|---|
| Grating direction | Stripe orientation relative to mounting datums |
| Illuminated field | Usable grating area and edge exclusions |
Inspect period, linewidth, defects and pattern orientation. Define any diffraction-efficiency measurement with its wavelength and geometry.
Alternating opaque and clear stripes vary the transmitted optical field across the grating. Period and duty cycle define the geometry. Under suitable illumination the periodic structure produces diffraction orders; their intensity distribution depends on the optical setup as well as the pattern.
Use a periodic pattern for spatial modulation, optical sensing or a defined line reference. Specify the illuminated area and stripe direction together with pitch. If the main task is visual focus or resolution comparison, a Ronchi ruling may be the clearer product choice.
This product controls transmission through film geometry. It does not specify a relief profile or a phase delay. A required diffraction angle or efficiency must be evaluated at the wavelength, incidence angle and polarization of the intended system.
| Control item | Information to confirm |
|---|---|
| Geometry and position |
|
| Substrate and optical path | Specify glass grade, thickness, wavelength and illumination side. Review transmission and reflections in the actual optical arrangement. |
| Inspection and acceptance | Inspect period, linewidth, defects and pattern orientation. Define any diffraction-efficiency measurement with its wavelength and geometry. |
| Drawing and revision | Provide a 1:1 DWG with declared units, clear and opaque layers, viewing direction, active area and the approved revision. |
Custom periodic glass patterns for a compatible optical readhead design.
Periodic amplitude patterns for an optical instrument design.
Not directly. A blazed grating uses a shaped structure to redistribute light among diffraction orders. A binary chrome grating has a different optical response.
Chrome amplitude gratings modulate light with repeating transparent and opaque stripes for optical reading and pattern testing.
Specify period, line width, duty cycle, orientation and usable area independently. Match contrast to the working wavelength.
Pitch, line width, duty cycle, orientation, active area, substrate and optical mode.
Pitch is the repeat distance of a complete light-and-dark period. Line width describes part of that period; specify both to define the clear-to-opaque ratio.