TOPAZ®: OSL lens of eye dosimeter

The TOPAZ is a passive lens of eye dosimeter compatible with OSLR reader.
It measures X-rays, gamma rays and beta radiation.

Specially designed for dosimetry labs, its functional design minimizes your set-up time.

Easy assembly
Clip-on parts
Reusable
Holder and MP7 OSL Sensor tracability with 2D barcode

Discover TOPAZ service cycle

Staff dosimetry

Workstation studies

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TOPAZ®: OSL lens of eye dosimeter

Characteristics Technical specifications Dimensions Measurement method Accessories Related products

3 colours available for wear period identification

Characteristics

The TOPAZ dosimeter does not affect participant’s activity and field of vision. Offered in two sizes, it is adapted to all PPE (Personal Protective Equipment): lead glasses, visors, mob caps… Selfgripping pads ensure a maximum fit.

You can configure it for measurements behind or in front of the PPE.

The cap can be oriented from vertical to horizontal position to fit your morphology and your PPE.

Technical specifications

Photons energy range	± 60° incidence angle from 16 keV to 1.33 MeV
Dose range	100 μSv – 10 Sv
Types of radiation measured	Photons (X- and gamma rays) and beta
Detector	Single MP7 OSL sensor
Sensor material	Aluminium oxide doped with carbone, Al₂O₃:C
Holder material	Polyamide

Dimensions

Weight:

M – 720 mg
L – 770 mg

Size:

M – 4.6 mm
L – 7.6 mm

Measurement method

MP7 OSL sensor

This ring uses a novel tissue equivalent MP7 OSL sensor. The OSL material is made from Aluminium oxide doped with Carbon (Al₂O₃:C).
The dose is measured using the OSLR readers.
The read out process uses a LED (Light Emitting Diode) to stimulate the detectors. The light emitted by the OSL material is measured by a photomultiplier tube (PMT) using a high sensitivity photon counting system.
The amount of light released during optical stimulation is directly proportional to the radiation dose.

Learn more about OSL technology