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PLX Lateral Transfer Hollow Retroreflectors™ (LTHR) Series: Excellent for aligning two or more parallel axis at any given distance while maintaining sub arc second accuracy.

Lateral Transfer Hollow Retroreflector Series


  • Perfect for folding parallel light 180° degrees.
  • Available with sub arc second accuracy.
  • Extremely temperature stable.
  • Large choice of coatings
  • Sealed all-weather enclosures available.
  • Vacuum-compatible.
  • PLX is a registered ISO 9001 company.

Coating Specification Chart


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Our Lateral Transfer Hollow RetroreflectorTM (LTHR) Series Products:

Find Ideal solutions for “U” fold in a large Michelson interferometer or back-to-back configurations for folding interferometers while maintaining sub arc second accuracy. PLX’s line of LTHR’s is extremely temperature stable because all component parts have the same coefficient of thermal expansion (CTE). A variety of coatings are available, as well customization and two aperture choices. 

Lateral Transfer Hollow Retroreflector Selector Chart

Dust Proof No Yes
Water/Humidity Proof No Yes
Vacuum-compatibility Yes Yes
Mechanical Stability Excellent Excellent
Thermal Stability Excellent Excellent
Vibration Very Good Very Good
Shock Resistance Excellent Excellent
Protective Housing Yes Yes