Laser Positioning System for Radiation Therapy Simulators

Product Specifications

Technical details and manufacturing context for Laser Positioning System

Definition

The Laser Positioning System is a critical component of the Radiation Therapy Simulator that projects multiple visible laser beams (typically red or green) onto the patient's skin to establish and verify precise positioning coordinates. It creates a three-dimensional reference grid that aligns with the treatment planning system, ensuring accurate patient setup by marking isocenter, field boundaries, and anatomical landmarks before radiation treatment delivery. The system uses low-power laser diodes that emit coherent light beams through precision optical lenses and mirrors. These beams are projected from fixed positions on the simulator gantry and walls to intersect at the treatment isocenter. The lasers are precisely calibrated to align with the imaging system's coordinate system, creating reference planes (sagittal, coronal, and transverse) that help position the patient within sub-millimeter accuracy. Key specifications include a red visible laser wavelength of 635 ±5 nm, Laser Class 2 per IEC 60825-1, positioning accuracy of ±0.5 mm at 1 m distance, repeatability of ±0.2 mm over full travel range, projection range of 0.5–3.0 m adjustable focal distance, line width of 1.0 ±0.2 mm at 1 m, input voltage 100–240 V AC auto-ranging, power consumption ≤50 W typical, operating temperature 10–35 °C, storage temperature -20–60 °C, relative humidity 20–80% non-condensing, ingress protection IP20 per IEC 60529, housing material aluminum with anodized finish, and weight ≤5 kg per unit. These values are directory reference ranges and must be confirmed for the actual model and application. The system is intended for indoor use only. Always verify model-specific values and standards with the legal manufacturer or supplier before procurement or use.

Working Principle

The system uses low-power laser diodes that emit coherent light beams through precision optical lenses and mirrors. These beams are projected from fixed positions on the simulator gantry and walls to intersect at the treatment isocenter. The lasers are precisely calibrated to align with the imaging system's coordinate system, creating reference planes (sagittal, coronal, and transverse) that help position the patient within sub-millimeter accuracy.

Common Materials

Laser diode, Optical glass lenses, Aluminum housing, Precision mirrors

Technical Parameters

Parameter	Typical range	Notes & selection driver
Laser Wavelength	635 ±5 nm	Red visible laser for patient marking
Laser Class	2	Safe for momentary exposureIEC 60825-1
Positioning Accuracy	±0.5 mm	At 1 m distance
Repeatability	±0.2 mm	Over full travel range
Projection Range	0.5–3.0 m	Adjustable focal distance
Line Width	1.0 ±0.2 mm	At 1 m distance
Input Voltage	100–240 V AC	Auto-ranging
Power Consumption	≤50 W	Typical operation
Operating Temperature	10–35 °C	For specified accuracy
Storage Temperature	-20–60 °C	Non-condensing
Relative Humidity	20–80 %	Non-condensing
Ingress Protection	IP20	Indoor use onlyIEC 60529
Housing Material	Aluminum	Anodized finish
Weight	≤5 kg	Per unit

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Laser Diode Module
Generates coherent light beam at specific wavelength

Material: Semiconductor materials (GaAs, InGaAs)
Collimating Lens Assembly
Focuses and shapes the laser beam to precise diameter

Material: Optical glass
Mirror Mount Assembly
Directs laser beam along required projection path with fine adjustment capability

Material: Aluminum with precision bearings
Calibration Mechanism
Allows precise alignment of laser beams to intersect at treatment isocenter

Material: Stainless steel with micrometer adjustments
Control Electronics
Regulates laser power and provides safety interlocks

Material: Printed circuit boards with semiconductor components

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Radiation Therapy Simulator

View system integration details

Manufacturers of Laser Positioning System

Manufacturer profiles associated with Laser Positioning System.

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Frequently Asked Questions

What is the typical laser wavelength and class?

The directory lists a red visible laser wavelength of 635 ±5 nm and Laser Class 2 per IEC 60825-1, which is safe for momentary exposure. Confirm these values for the specific model.

What accuracy and repeatability can be expected?

The listed positioning accuracy is ±0.5 mm at 1 m distance, and repeatability is ±0.2 mm over the full travel range. These are reference values; verify with the manufacturer for your application.

What are the environmental operating limits?

The system operates in temperatures 10–35 °C, storage -20–60 °C, and relative humidity 20–80% non-condensing. It is rated IP20 for indoor use only.

How should I verify compliance with standards?

The listed standards (IEC 60825-1, IEC 60529) are procurement references. Always request documentation from the legal manufacturer or supplier to confirm compliance for the specific model.

Data Basis

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Preliminary Technical Classification

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pressure:	Atmospheric pressure only (non-pressurized system)
other spec:	Relative humidity: 30% to 70% non-condensing, Vibration: <0.5g, Laser class: 2M visible red (635nm)
temperature:	15°C to 30°C (operating), 5°C to 40°C (storage)

Laser Positioning System

Product Specifications

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