The green laser JD303 is a generic model of a powerful, rechargeable laser pointer with an adjustable focus and a green beam of 532 nm. It is often sold with a rechargeable 18650 lithium battery, a charger, and a key-activated safety lock.
Features and specifications
Beam and wavelength:TheJD303produces a visible green beam with a wavelength of 532 nm. The green light is highly visible, especially in the dark.
Adjustable focus:A key feature of this laser is the adjustable focus, which can change the size of the beam spot. Focusing the beam to a fine point at close range can be powerful enough to burn certain materials, like a match.
Star caps:The laser typically comes with a removable "star cap" or "disco rotator." When attached, this cap diffracts the laser beam into multiple patterns, creating a dynamic visual effect for entertainment or parties.
Power:Different retailers list various power outputs, ranging from 30mW to 1000mW or more. Be aware that some listed power outputs may be exaggerated.
Safety features:The device includes a safety lock, typically requiring a key to activate and operate. This is a critical feature, given the laser's high power.
Battery:TheJD303is powered by a rechargeable 18650 lithium-ion battery.
Applications:Common uses for theJD303include stargazing, presentations, camping, hiking, and as a signaling device.
Safety considerations
Eye hazard:TheJD303is not a toy. It is a high-power laser that can cause permanent eye damage with direct exposure. It should be kept out of reach of children.
Overheating:The device should not be operated continuously for extended periods (typically more than 30 to 60 seconds), as this can cause the internal components to overheat and fail.
Recalls:Some versions of theJD-303have been subject to product recalls due to safety concerns and mislabeling of power class. It is important to treat anyJD303with extreme caution.
