CdTe Blazed Diffraction Grating Machining with (110) Orientation
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Solution Overview
Problem
Existing methods fail to precisely machine grating grooves in Echelle diffraction gratings made of CdTe or CdZnTe crystal materials, particularly in a stable ductility mode, affecting their optical performance, especially when the crystal orientation and critical cutout thickness are not optimally set.
Innovation Solution
A manufacturing method that forms Blazed diffraction grating grooves using a superfine cutting machine with a diamond tool, setting the crystal orientation of the surface receiving incident light to the (110) plane, ensuring precise machining and minimizing brittle failures, thereby achieving high surface precision and diffraction efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If superfine cutting is used to form grating grooves in CdTe or CdZnTe crystal, then manufacturing precision can be improved, but brittle failures increase when crystal orientation is not optimally set
Solution Approach 1:
The patent applies parameter changes by optimizing the crystal orientation parameter to specifically the (110) plane. This parameter change transforms the material's mechanical properties during machining, enabling stable ductility mode and preventing brittle failures while maintaining high manufacturing precision of the grating grooves.
2Manufacturing precision
If critical cutout thickness is reduced to improve surface precision, then manufacturing precision improves, but machining stability deteriorates
Solution Approach 1:
The patent changes the crystal orientation parameter to (110) plane, which fundamentally alters the material's response to machining. This parameter change enables the material to maintain ductility even at critical cutout thicknesses, thereby achieving high surface precision while preserving machining stability.
3Ease of manufacture
If (111) plane orientation is used for machining, then ease of manufacture is improved, but manufacturing precision deteriorates for CdTe or CdZnTe crystal
Solution Approach 1:
The patent identifies that while (111) plane may be easier to machine conventionally, changing the crystal orientation parameter to (110) plane provides superior manufacturing precision for CdTe or CdZnTe crystals. The (110) orientation enables stable ductility mode that produces higher precision grating grooves with surface roughness of 10 nm or smaller.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method enables the production of high-quality diffraction gratings with surface roughness of 10 nm or smaller, improving optical performance by maintaining the (110) plane orientation for both short and long sides, which is critical for both transmission and reflection types.
Implementation Method 1
forming a plurality of grating grooves in a processed surface of a work through machining using a processing machine
Data Source
AI summary
A manufacturing method of a Blazed diffraction grating configured to diffract incident light and made of a CdTe or CdZnTe crystal material includes the step of forming a plurality of grating grooves in a processed surface of a work through machining using a processing machine for the Blazed diffraction grating. The forming step forms the grating grooves so that among surfaces of gratings formed by the forming step, a surface that receives the incident light most is set to a (110) plane as a crystal orientation of the crystal material.