Bentec Services Ltd (Canada)

Define and control non-spherical wave fronts - 'key' to advanced device fabrication.

Aspherical optical design; mould tool inserts; polymer optics and hyper-aspherical optical surfaces.

Uniqueness: Hyperaspheres are independent of a conic constant and aspheric coefficients. Standard optical software requires pre-defined optical surfaces. In contrast, hyper-aspherical surfaces are a dynamic consequence of 'pre-defined wave-fronts' - key to advanced fabrication.

Free Software: Bentec offers free software - both generally, and related to specific projects regarding aspherical lens design and manufacture. If there is an application in mind, we would be delighted to illustrate the optical system - with perhaps a view to manufacturing the optical device related to the project. Niche markets and highly confidential exclusive partnerships are our interests, in conjunction with the development of enabling technologies.

The free software: written in Visual Basic 6 or Excel VBA programming language - illustrates your project but using hyper-aspherical optical surfaces. These surfaces provide the 'initial design process' with immediate results and serve to remove many of the complexities of aspherical surface design. The techniques here employed are 'unique'. Any desired wave front may be imposed as input, output or between existing surfaces. Fermat's principle provides the glue that holds the surfaces together. Hyper-aspherical optical surfaces may be 'simultaneously' combined, (multiplexed).

Hybrid lenses: One may improve (or alter) the optical function of a conventional glass lens - using a drop of UV photo polymer and a moulding die.

Advantages: The highest quality optics are achieved with lens surfaces created by the casting process.

• 'Very' stable manufacturing process - few, process variables;

• Long life, high precision die;

• Minimum internally-induced mechanical or thermal stresses;

• Range of refractive indices;

• Excellent overall transmission - (1 to 300 µm) polymer layer upon glass substrate;

• High homogeneity, low birefringence;

• Fresnel structure, Mirror and Grating applications;

• Multiple optical functions may be combined;

• Correction of laser diode astigmatism using a thin cylindrical layer on the flat side of a glass convex-plano lens;

• On Demand Cure - only cures on exposure to UV light;

• No Solvents - 100% Solids - no mixing, no waste, no disposal of waste, no cleaning of mixing containers, no problems with pot life of mixed materials;

• Readily adapted into existing processes; Automated Handling, Dispensing and Curing can be employed to improve production efficiency and thus reduce costs.

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