The moorLDI2-II has a visible red 633nm wavelength laser beam. The accessible power is less than 1 mW (typically 0.9mW) making this a Class 2 laser system. The low power and the visibility of the laser beam make it suitable for use in areas where the restriction of entry to unauthorised persons may be difficult to control.

The laser power is little less than one half of that used in the moorLDI2-IR imager which has a near infra red 785nm laser beam power about 2mW. (Note that the near infrared beam is combined with a visible red aiming beam to aid the ‘marking’ of the region of skin or other tissue to be scanned. The red beam also provides the ‘blink reflex’ eye protection.

The higher power used in the moorLDI2-IR results in a sensitivity greater than 4 times that of the moorLDI2-II; however in general for scan areas up to about 30cm x 30cm the sensitivity of the moorLDI2-II is satisfactory. For areas of skin where the blood flow is medium to high scans of areas up to 50cm x 50cm can be done though the image quality will not be to the standard achieved with the moorLDI2-IR imager.

The images displayed demonstrate the image quality achieved when a warm hand is scanned with the moorLDI2-II. These are images (resolution 256 x 256 pixels, over 64,000 individual measurements) scanned at distances of between 20 to 100cm.

The uppermost image is an area of about 6cm x 6cm whilst the lowest image is an area of about 50cm x 23cm.