Design of diffractive lenses that generate optical nulls without phase singularities

Area of Science:

• Optics and Photonics
• Materials Science

Background:

• Diffractive lenses are crucial optical components.
• Focusing optical nulls presents unique design challenges.

Purpose of the Study:

• To develop a novel method for designing diffractive lenses capable of focusing optical nulls.
• To create lenses with simplified fabrication through concentric circular zones.
• To assess the adaptability of the design technique for multi-wavelength applications and fabrication error tolerance.

Main Methods:

• Employed nonlinear optimization techniques.
• Designed diffractive lenses with concentric circular zones.
• Investigated multi-wavelength performance and fabrication error tolerance.

Main Results:

• Successfully designed diffractive lenses that focus optical nulls without phase singularities.
• Demonstrated the feasibility of using concentric circular zones for ease of fabrication.
• Showcased the technique's extendibility to multiple wavelengths.
• Confirmed improved tolerance to fabrication errors.

Conclusions:

• Nonlinear optimization provides an effective method for designing advanced diffractive lenses.
• The proposed lens design offers practical advantages in fabrication and performance versatility.
• This approach holds potential for next-generation optical systems requiring precise control of light fields.