High-NA Long Working Distance Objective for Ion Trapping
Optical Design: Balancing Resolution, Field of View, and Working Distance
The objective lens is engineered to achieve high resolution, wide field of view (2500 μm × 400 μm), and extended working distance while maintaining minimal aberrations across UV and visible wavelengths.
Multi-Wavelength Aberration Correction
A cemented triplet configuration using crown and flint glass was selected to minimize chromatic aberration. Each of the three lens groups is tailored for 397 nm, 400 nm, and 632.8 nm wavelengths, achieving:
- Chromatic aberration ≤ 0.02λ
- Spherical aberration, coma, and astigmatism correction through asymmetric curvatures and lens tilt optimization
RMS wavefront aberration ≤ 0.05λ across the spectral range