TEL301 Direct View Telescope

  • TEL301 Telescope and Apertures
  • TEL301 Direct View Telescope Front View
  • TEL301 Direct View Telescope Side View

The TEL301 has options on working distance and is supplied with a range of apertures to define the area of the source measured.

The addition of a DH400-VL photometric detector and the ORM400 picoammeter turns the TEL301 into a versatile luminance measuring spot meter.

Core benefits

Features

  • Direct view telescope
  • Four interchangeable apertures are supplied giving angular fields of view (fov) at 6', 20', 1° and 2°
  • Linear coverage at a distance D is: 2D tan (FOV/2)
  • A range of coupling options

Optical

LensDescriptionWavelength RangeFocusing Range
TEL301_LENS_TL-MACROTL macro lens350-3000nm25mm
TEL301_LENS_TL1-ACH-VISTL1 VIS achromat lensOptimised for 350-800nm1m-infinity
TEL301_LENS_TL1-ACH-NIRTL1 NIR achromat lensOptimised for 600-1300nm1m-infinity
TEL301_LENS_TL1-ACH-IRTL1 IR achromat lensOptimised for 1000-1700nm1m-infinity
TEL301_LENS_TL1-QTL1 UV quartz lens200-2500nm1m-infinity
TEL301_LENS_TL2TL2 close-up lens350-3000nmm150mm
TEL301_LENS_TL2-ACHTL2 close-up achromat lensOptimised for 400-700nm150mm
TEL301_LENS_TL2-QTL2 close-up UV quartz lens200-2500nm150mm

Mechanical

Dimensions 
Compatibility1/4" threaded hole to mount to tripod

Coupling options

TEL301_DIRECTTEL301 direct-view telescope, slit mounting
TEL301_SMATEL301 direct-view telescope, SMA fibre output
TEL301_FOP_ADAPTORAdaptor to TEL301_DIRECT for fibre bundle coupling

Lens options

LensDescription
TEL301_LENS_TL-MACROTL macro lens
TEL301_LENS_TL1-ACH-VISTL1 VIS achromat lens
TEL301_LENS_TL1-ACH-NIRTL1 NIR achromat lens
TEL301_LENS_TL1-ACH-IRTL1 IR achromat lens
TEL301_LENS_TL1-QTL1 UV quartz lens
TEL301_LENS_TL2TL2 close-up lens
TEL301_LENS_TL2-ACHTL2 close-up achromat lens
TEL301_LENS_TL2-QTL2 close-up UV quartz lens

Ordering information

TEL301_DIRECTTEL301 direct-view telescope, slit mounting
TEL301_SMATEL301 direct-view telescope, SMA fibre output
TEL301_FOP_ADAPTORAdaptor to TEL301_DIRECT for fibre bundle coupling
TEL301_LENS_TL-MACROTL macro lens
TEL301_LENS_TL1-ACH-VISTL1 VIS achromat lens
TEL301_LENS_TL1-ACH-NIRTL1 NIR achromat lens
TEL301_LENS_TL1-ACH-IRTL1 IR achromat lens
TEL301_LENS_TL1-QTL1 UV quartz lens
TEL301_LENS_TL2TL2 close-up lens
TEL301_LENS_TL2-ACHTL2 close-up achromat lens
TEL301_LENS_TL2-QTL2 close-up UV quartz lens

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