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Temperature-Controlled Lens Tubes

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Temperature-Controlled Lens Tubes

Temperature-Controlled Lens Tube
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SM1L10H Mounted to a Ø1/2" Post via an SMR1 Fixed Mount


  • Temperature-Controlled Lens Tube for Heating Ø1" Optical Components
  • Lens Tube with Passive Heat Sink for Cooling Ø1" Optics
  • Directly Compatible with SM1-Threaded (1.035"-40) Lens Tubes

Thorlabs offers lens tubes featuring controlled heating and passive cooling. The Temperature-Controlled Lens Tube can heat Ø1" optics up to 75 °C, which is ideal for tuning the performance of temperature-sensitive components and preventing condensation from forming on a lens surface. This lens tube is also equipped with an embedded NTC 10 kΩ thermistor that provides temperature feedback and automatic temperature control with the compatible TC200 Temperature Controller (sold separately). For cooling Ø1" optical components exposed to large amounts of heat, our Passive-Heat-Sink Lens Tube features a low 0.25 °C/W thermal resistance with a exposed surface area of 79 square inches (510 square cm) and is directly compatible with SM1 Lens Tubes.

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Temperature-Controlled Lens Tube
Temperature Range Room Ambient to 75 °C Max
External Dimensions Ø1.87" x 1.56" Long
Internal Opening Dimensions Ø0.945"
Temperature Sensor NTC 10 kO Thermistor (BETA = 3750)
Heater Resistance 20 ± 1 Ω
Typical Heating Capacity 10 Watts
Maximum Heater Current 700 mA (@ 10 W)
Compatible Lens Tube SM1 (1.035"-40)
Recommended Heater Controller TC200
  • 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

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 of 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 Fixed Lens Mount.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
SM1L10H Support Documentation
SM1L10H Temperature-Controlled SM1 Lens Tube, One SM1RR Retaining Ring Included
Passive-Heat-Sink Lens Tube
  • SM1 Lens Tube Equipped with Heat Sink for Passive Cooling
  • Offers 0.25 °C/W Thermal Resistance Over 2.10" (53.3 mm) Length
  • Internal SM1 (1.035"-40) Threading Directly Compatible with Our Ø1" Lens Tubes

The HSLT1 Passive-Heat-Sink Lens Tube provides the ability to cool down a lens tube setup that may be subject to an unusual amount of heat. By providing a total surface area of 79 square inches (510 square cm), the HSLT1 provides a thermal resistance of 0.25 °C/W. Ø1" optical components can be mounted into the passive heat sink lens tube using an SM1RR retaining ring (not included). This lens tube is directly compatible with our SM1 Lens Tubes and can be mounted to SM05, SM2, or SM3 setups by using our Lens Tube Adapters.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
HSLT1 Support Documentation
HSLT1 Passive-Heat-Sink SM1 Lens Tube
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