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These 405nm laser diode modules are available with output powers of 0.9mW, 4mW or 25mW. They are able to produce a circular beam of 2mm diameter (0.9mW model) or an elliptical beam of 3.5 x 2mm (4mW and 25mW models). They have a beam divergence of <0.6mrads (0.9mW) or 0.6 x 0.3mrads (4mW and 25mW). All modules feature an adjustable focusing lens, a low operating current of less than 80mA and a bore sighting of less than 2°. These modules also offer the added advantage of TTL modulation input, which will accept signals from DC up to 1kHz. Electrical connections are made via 300mm flying leads, modules will accept operating voltages between 8VDC to 10VDC (Recommended power supply #59-100). Meets IEC in accordance with CDRH. Modules are cooled through the cylindrical walls and so must be mounted in an appropriate heat sink. Recommended heatsink is #59-608, this is suitable for use with all modules. Post and postholder not included (see Posts and Postholders).