Temperature-Controlled Lens Tube

  • Client

    Thorlabs, Inc.

  • Services

    To prevent condensation from forming on optics.

  • Technologies


  • Dates



The SM1L10H Temperature-Controlled Lens Tube is a small heating device that is compatible with our Ø1" Lens Tubes. It is an ideal choice for applying heat to mounted optics in order to control their performance as a function of temperature. It can also be used to prevent condensation from forming on optics.


Optics can be secured inside the heating chamber with the included SM1RR retaining ring. The SM1L10H contains an embedded NTC 10 kΩ thermistor that provides temperature feedback and allows automated control of the internal heating element. It is directly compatible with our TC200 Temperature Controller.


The temperature-controlled lens tube can be post mounted using an SMR1(/M) Fixed Lens Mount.



  • SM1 Lens Tube Featuring Controlled Heating for Ø1" Optics
  • Embedded NTC 10 kΩ Thermistor Provides Temperature Feedback
  • Directly Compatible with Our SM1-Threaded (1.035"-40) Lens Tubes



Temperature Range

Room Ambient to 75 °C Max

External Dimensions

Ø1.85" x 1.43" Long
(Ø47 mm x 36 mm Long)

Clear Aperture

Ø0.90" (Ø22 mm)

Temperature Sensor

NTC 10 kΩ Thermistor
(BETA = 3750)

Heater Resistance

19.7 Ω ± 10%

Maximum Heating Capacity

30 Watts

Maximum Heater Current

700 mA (@ 10 W)

Compatible Lens Tube

SM1 (1.035"-40)

Recommended Heater Controller



It is used in Electrical Industries.


Thorlabs, Inc.(USA)Tel:1-973-300-3000,