Comparative analysis of deformable mirrors for ocular adaptive optics.

Area of Science:

• Ophthalmic optics
• Biomedical engineering
• Optical metrology

Background:

• Ocular aberrations significantly impact visual acuity.
• Deformable mirrors offer a potential solution for correcting these aberrations.
• Evaluating commercial deformable mirrors is crucial for advancing ophthalmic technology.

Purpose of the Study:

• To assess the efficacy of three commercially available deformable mirrors in compensating for ocular aberrations.
• To compare the performance of membrane, piezo, and bimorph deformable mirrors.
• To validate a methodology for evaluating new deformable mirror technologies.

Main Methods:

• Utilized a validated eye aberration model (Thibos, Bradley, and Hong).
• Tested a 37-actuator membrane mirror, a 19-actuator piezo mirror (OKO Technologies), and a 35-actuator bimorph mirror (AOptix Inc).
• Employed a Twyman-Green interferometer to measure mirror modes fitted to Zernike polynomials and ocular wavefronts.

Main Results:

• The 35-actuator bimorph mirror exhibited the lowest root mean square error in aberration compensation.
• The 19-actuator piezo mirror showed promising results, suggesting potential with increased actuator count.
• The evaluation methodology proved effective for comparative analysis of deformable mirrors.

Conclusions:

• The bimorph deformable mirror is a highly effective option for ocular aberration correction.
• Further development of piezo-based deformable mirrors could enhance their performance.
• The established methodology provides a reliable framework for future deformable mirror assessments.