25 years of experience
Sumipro was founded in 1995, starting with the manufacturing of special contact lenses with Single point diamond turning. In the early 2000s, technical optics began to have considerable impact on our services. Over the years, technology has revolutionized our world. With our knowledge, experience and cooperation with our suppliers we try to create solutions for our customers which have an extra added value through innovation and application of state of the art design and production facilities.
In 2005 Sumipro moved to our current location in Almelo. In 2012 we added optical coatings to our services. These facilities have been completely modernized in 2020 and is fully automated. During the years we have created a proven track record of helping our customers with fast delivery and a flexible attitude.
What we do
Single point diamond turning (SPDT) is a well known method for manufacturing micro optics. The big difference between a standard lathe and a single point diamond turning machine is that the SPDT machine uses a diamond tipped bit for its machining and it is able to machine surface finishes of a few nanometers.
The ultra precision (UP) machines manufactured by LT Ultra are used to prepare non-ferrous materials for optical-grade laser equipment. However, we are not limited to that: We can create precise surfaces on the most delicate of structures. Examples include air bearings and high precision tooling.
We offer protected aluminum (Al/SiO) reflective optical coatings. All of our aluminum reflective coatings meet Military Specifications and all optical coatings are tested and inspected before being shipped. We offer durable reflective coating with an average of more than 90% in the visible region.
Lapping can be used to obtain a specific surface roughness. It is also used to obtain very flat surfaces. Surface roughness and surface flatness are two quite different concepts. We are one of the only companies left in The Netherlands that is using these traditional techniques.
In our laboratory we have the following equipments at our disposal:
- Microscopes less than 2 microns
- Foci meter and dioptre meter
- Wyko 400 IOL interferometer
- Zygo Intelliwave interferometer
- LT Ultra interferometer
- Form Talysurf PGI 840
Examples of our products
Prototype lenses for VR, AR and mixed reality headsets.
Prototype lenses for lighting and automotive industries
Prototype lenses for smartphones and other consumer electronics. (ZEONEX, APEL, OKP1, OKP4, PMMA, Polycarbonate)
We are able to cut aluminium and other non-ferro materials to shine, not like a mirror but better. (Aluminium, RSA, Arcap, copper, brass, nickel.)
Our IR lenses are used in night vision and thermal imaging applications. (Silicon, germanium)
we are capable of producing extreme surface finishes. As one of the few diamond lathing manufacturers from the Netherlands, we hold a reputable track record with many well known companies.
Mould inserts have diameters from 0.3 mm up to 300 mm and are most often realized in steel or nickel coated on brass for optimal surface form accuracy and minimum roughness.
We can provide exclusive polygons with astounding accuracy. The accuracy is roundtable 40 nanometer, and an angle accuracy of 0.2 arcsecond. We are also capable of reproducing this within 3 nanometer.
Manufacturing tolerances
Part sizes: 2 mm till 300 mm
Surface Roughness (Ra): < 6 nm
Form accuracy: 0.1 µm 100 mm*
Spherical
Aspherical
Fresnel and diffrax patterns
Parabola’s, ellipses
Off-axis
Freeforms
Polygons
Part sizes: 2 mm till 50 mm
Surface Roughness (Ra): < 6 nm
Form accuracy: 0.1 µm 100 mm*
Spherical
Aspherical
Fresnel and diffrax patterns
Parabola’s, ellipses
Off-axis
Freeforms
Polygons
Part sizes: 2 mm till 200 mm
Surface Roughness (Ra): < 6 nm
Flatness: 0.1 µm 100 mm*
Spherical
Aspherical
Fresnel and diffrax patterns
Parabola’s, ellipses
Off-axis
Freeforms
Polygons
How we do it
Nanoform 200
EPT Optomatic
Flycutting machine
Fully automated and retrofitted Balzers coating machines. With our developed software package it is now possible to operate the machines trough touchscreens.
Form Talysurf
Lapping can be used to obtain a specific surface roughness. It is also used to obtain very accurate surfaces, usually very flat surfaces. We are one of the only companies left in The Netherlands that is using these traditional techniques.
We make use of industry-leading software packages such as: SolidWorks, Topsolid, DiffSys, Ushape, IntelliWave. We also write custom software applications to convert files into usable machine data or automate machines.
With our Trotec laser cutting and engraving machine we can precut plastics and use it for engraving mould inserts.
Filetypes en formats
Sumipro is prepared to work with many different filetypes or drawings. We always look for a way to achieve the best results for your products.
If you’re unfamiliar with CNC (Computer Numerical Control), it enables our diamand turning machines to transform computer-based designs into G-Code. G-Code is a programming language made up of letters and digits and tells our CNC machines where and how to move. Using what are called Cartesian coordinate locations, the machine is fed instructions including direction, speed and depth, enabling it to create products from a computer image.
If your files are not delivered according to our specifications, we have to convert them to usable files but there are additional programming costs involved.
For quotations we only accept technical drawings to make sure all features of a product/component, including surface roughness, dimensions and quantity are known. This is the only way to calculate a realistic price for the required product.
Download specification sheet
Bedrijvenpark Twente 323
7602 KL Almelo
The Netherlands