Design method for engineering the initial structure of a spectrometer.

Area of Science:

• Optical engineering
• Spectrometer design

Background:

• Traditional optical initial structure methods (MOIS) focus solely on optical properties, neglecting component dimensions.
• This oversight leads to significant discrepancies between initial and optimized parameters, reducing the initial structure's practical value.

Purpose of the Study:

• To introduce a more efficient design method for engineering initial structure (MEIS) in spectrometers.
• To incorporate physical constraints like component size and relative positioning to prevent optical element interference.

Main Methods:

• Deduction of anti-interference conditions using ray tracing.
• Derivation of imaging formulas via geometric optics.
• Rapid calculation of component parameters and initial structure acquisition with spacing margins.

Main Results:

• Successful design of a wide-band, high-resolution spectrometer (700-1000 nm, 0.5 nm resolution) using MEIS.
• MEIS resulted in more rationalized component placement and eliminated complex optimization.
• Minimal changes in image plane position, wheelbase (<0.5 mm), and deflection angle (0.5°) were observed.

Conclusions:

• MEIS provides a valuable reference for rapid and efficient spectrometer design.
• The method ensures initial structures are physically feasible and avoid component interference.
• MEIS significantly improves upon the limitations of previous optical-only design methods.