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DIFFSYS® "A" Aspheres only
This is the entry-level version for spheres, aspheres, and multi-segment aspheres; with comprehensive diamond tool corrections, lead-in/out codes, Sag tables, resize, B-axis, inch/mm, and various jobfile formats. You can add further options later on as required
A surface with 2 aspheric segments
The same surface as above, but mirrored
and repeated in an array
DIFFSYS® "AZ" Zones option: (Diffractives, Fresnels)
(You purchase either 'AZ' or 'AZ3') The 'Z' option allows you to create diffractives and fresnels.

DIFFSYS® has become the industry standard for machining zoned surfaces.

DIFFSYS® was originally developed for machining diffractives, and this our area of special expertise. Currently there is no international definitive specification for describing these zoned components, and over the past 10 years we have seen perhaps 15 different formats. Fortunately DIFFSYS® can handle all of them. If you have a problem with entering a design, into DIFFSYS®, we shall be pleased to help.

Diffractives and Fresnels... What's the difference? Diffractives generally have a fixed step height, which is related to the wavelength of the light being used, and is therefore usually between 1 and 5 microns. Fresnels generally have variable step heights, which tend to be much larger than the wavelength. See the diagram below.
Here is a mathematical curve, which has been setup in DIFFSYS. You can see how the same curve can be used to define a fixed-step-height diffractive, and also a variable-step-height fresnel. Note that in the lower case, the zone widths are constant. The vertical scales have been greatly exaggerated, and normally, the diffractive would have much smaller steps than the fresnel. Notice that the curve changes direction, and so do the step directions - DIFFSYScan handle this, although we do not see such designs very often.
DIFFSYS® 'A3' 3D option:
Slow-tool and rastering
(You order either 'A3' or 'AZ3') Generates ultra-precision off-axis aspheres, atorics, acylinders, and freeforms, either by raster flycutting or 'slow/fast-tool-servo'. Lots of features and options.
This version also includes the 2D Aspheres-only functions.

DIFFSYS has two 3D machining modes:

XYZ raster flycutting/milling
With a Y-Axis attachment, you can flycut either in a standard 'zigzag' raster or an XYZ spiral. Select either round or rectangular surfaces.

CXZ (spiral) tool servo
This is the most popular method, requiring an encoded spindle. Either use your existing XZ machine in 'slow-tool-servo' mode, or fit a 'fast-tool-servo' attachment.
Spiral XYZ flycutting of an off-axis asphere
Spiral CXZ slow-tool-servo of an off-axis asphere
DIFFSYS® 'AZ3' 3D Option 3d: Surfaces, freeforms

Above we described the 3D tooling configurations available with DIFFSYS®.
Here are the types of 3D surfaces we can currently machine:

Sinewave arrays X- and Y- tilts and offsets are available for some surfaces.

Atoric CXZ (spiral), with polishing oscillations
Off-Axis asphere CXZ (spiral) with polishing oscillations.
Acylinder XYZ (raster)
Options and Upgrades

DIFFSYS® 'MC2' option: 2D imported data and measurements

The Taylor Hobson Talysurf is arguably the best instrument currently available for measuring aspheres. The DIFFSYS MC2 Option will read-in a Talysurf file (binary or ASCII) and use it to make the final sub-micron corrections to a machined part.

All you do is select the measurement file, and DIFFSYS does the rest. Alternatively, there are several functions to manually manipulate the data, which is displayed graphically: Fold, Flip, Smooth and Offset.

NEW: Multiple files - Any number of successive measurements can be stored and added together, ideal for mold corrections. Hybrid Diffractives - Use a measurement of the base curve to correct the final diffractive cut. 3D - Use one or two 2D measurements to correct a 3D surface. Replicate any surface by importing a raw measurement, and smoothing it.

DIFFSYS can also read-in most types of XZ data from other sources. Send us a sample.
For Talysurf, see www.taylor-hobson.com
MC2 ht 10
MC2 ht 11
Display of raw measurement data (unfolded). The centerpoint is found automatically.
The same file with 20% smoothing
DIFFSYS 'MC3' option: 3D imported data and measurements

With the MC3 Option, you can import any XYZ ASCII data and generate an optical quality surface. Typically, customers import just 2000-3000 points. In fact you can create a perfectly smooth surface with just 20 points. DIFFSYS® performs a careful 3D 'spline' smoothing of the surface.

You can either import CAD data to produce a surface, or measurement data to correct a 3D surface.
Pictures show a 3D probe measurement, imported into DIFFSYS to make a 3D correction.
MC3 ht 20

DIFFSYS® 'UP' option: 12 months technical support

With the MC3 Option, you can import any XYZ ASCII data and generate an optical quality surface. Typically, customers import just 2000-3000 points. In fact you can create a perfectly smooth surface with just 20 points. DIFFSYS® performs a careful 3D 'spline' smoothing of the surface.

You can either import CAD data to produce a surface, or measurement data to correct a 3D surface.

DIFFSYS® 'MC3' option: 12 months technical support
We pride ourselves in excellent and prompt technical support.

When you purchase DIFFSYS® you receive 12 months Technical Support..

We have many years experience in diamond machining, particularily diffractives, and can help you enter design data into DIFFSYS®, and help you use the program.

We take pride in the fact that we have yet to see a diffractive design which we cannot create.


February 22, 2017
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Contact Us:
Corporate Office:
44 Blackbrook Road
Keene, NH 03431 USA
Tel: 603 357-2511
Fax: 603 358-6174
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