Laser Focusing Objectives

Many industrial laser applications require a higher degree of aberration correction than can be achieved from best forms singlet lenses and standard microscope objectives. Whether correction over larger apertures, several wavelengths or a wider field is needed, it may be necessary to use a laser focusing objective. Special Optics has a wide variety of standard designs along with custom options to meet many demanding applications.

Features:

  • Diffraction limited performance

  • Air-Spaced for high damage thresholds

  • Achromatic & apochromatic designs

  • Ideal for UV excimer & high power YAG lasers

  • Transmission greater than 97%

Applications:

  • Laser micromachining

  • Laser scribing

  • Laser photoablation

  • Optical/laser microlithography

Special Optics is an ITAR registered company. 

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  • Achromatic and Apochromatic
  • Single Line Focusing Objectives
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Achromatic Objective Lenses

An advantage of additional lens elements is the ability to combine lenses of different materials and optical properties to correct for chromatic aberrations. Achromatic focusing objectives are aberration corrected at two wavelengths simultaneously. A doublet consisting of two lenses of different materials can be designed such that the effective focal length and performance will be the same at two separate wavelengths. Contact us to discuss your needs. 

Apochromatic Objective Lenses

Special low dispersion glasses allow for the design of lenses which are chromatically corrected for a range of wavelengths. Such lenses are referred to as having minimal secondary spectrum. Camera lenses are an extreme example of apochromatic lenses. Contact us to discuss your needs. 

Single Line Focusing Objectives

All Special Optics Single Line Focusing Objectives are corrected for astigmatism and coma over the specified spectral range. However, they are not corrected for chromatic aberrations. These lenses are well suited for use with Solid State and Gas Lasers where only one wavelength is in use, or when shifts in focal lengths can be tolerated as the wavelength must be specified when ordering to indicate the appropriate anti-reflection coatings. 

Features
  • Diffraction limited design
  • Air-spaced for high power applications
  • Standard models available for UV wavelengths 
Specifications
  • Coating Damage Threshold: 500 MW/cm2
  • Surface Quality: 20-10
  • Transmission: >97%
  • Wavelength Range (microns): <1/4 wave
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