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Related Concept Videos

Focusing of Light in the Eye01:16

Focusing of Light in the Eye

Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...
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Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
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Published on: January 28, 2019

Real time modulable multifocality through annular optical elements.

J Perez1, J Espinosa, C Illueca

  • 1Departamento de Optica, Universidad de Alicante. Carretera San Vicente del Raspeig s/n, 03690 San Vicente del Raspeig, Alicante, Spain. jorge.perez@ua.es

Optics Express
|June 11, 2008
PubMed
Summary
This summary is machine-generated.

New multifocal optical elements with controllable foci were developed using annular transmittance. These elements offer adjustable focal depth and energy, suitable for advanced optical and ophthalmic applications.

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Area of Science:

  • Optical Engineering
  • Ophthalmic Optics

Background:

  • Multifocal optical elements are crucial for applications requiring multiple focal points.
  • Current multifocal technologies face limitations in flexibility and control.

Purpose of the Study:

  • To introduce and analyze novel multifocal optical elements with tunable focal properties.
  • To explore the potential of these elements in instrumental and ophthalmic optics.

Main Methods:

  • Design of multifocal elements utilizing an annular transmittance distribution.
  • Analysis of focal peak quality and the maximum achievable number of foci.
  • Implementation on a spatial light modulator for real-time reconfiguration.

Main Results:

  • Demonstrated selectable number of foci with controllable energy distribution.
  • Achieved design flexibility for fixed positions or extended focal depth.
  • Validated real-time reconfiguration capabilities using a spatial light modulator.

Conclusions:

  • The developed multifocal optical elements offer significant advantages in control and flexibility.
  • Potential applications include advanced instrumental optics and next-generation intraocular implants.
  • Real-time adjustability enhances their utility in dynamic optical systems.