High dynamic range shutter plates:

These are neutral colour shutter/dimmer plates made with a varying dot pattern.
The dot pattern is created by dedicated rastering software to obtain an accurate and high dynamic range, up to 16-bit resolution.
The standard dynamic range is from 0.005% to 92.5%, which is the transmission limit of the glass.
Intensity resolution is 0.002%.

The high dynamic range allows precise light intensity control, especially in the low intensity range near zero.
The dot pitch is varies dependent on the selected dynamic range

This feature allows to install the shutter much closer to the focal plane than other shutter systems.

Optionally we can make the dimmer plate with a stochastic pattern to reduce moiré effects.
In this case dot size can be chosen for the optimum balance between dynamic range and diffraction.

The plates have a good batch to batch consistency.
Because these shutters are of the reflective type, little light energy is absorbed in the shutter making it compatible with high-power lamps
These can be made in any shape up to 125x220mm
The standard coating is medium matted aluminium, other coatings are available upon request
Standard substrate glass is Schott Borofloat33 thickness 1.1mm.
Other substrate glass and other glass thickness is available upon request.

Applications: theatre lighting, automated lighting, scientific instruments.

Because of the nature of the substrate glass, transmission is limited to 92.5%
This can be increased to >97% by applying double sides MgF2 broadband AR layers.
Another option is to use the shutter in such a way that it is pulled outside the light path for full transmission.
In that case there will be no obstruction left.

The curve can be linear, x^n, exponentional, or any other mathematical function.

The plate can have a separate track in the image, allowing for indexing to determine the absolute position.