The Red Dot Laser Head operating at 4.5V is a compact and versatile laser module that emits a red laser beam with a wavelength of 650nm. This module is commonly used for various applications that require a visible laser pointer or indicator.

Key features of the Red Dot Laser Head:

1. Low Operating Voltage: The laser head operates at a low voltage of 4.5V DC, making it suitable for a range of power supply sources.

2. Precise Laser Beam: It emits a red laser beam in the form of a dot. The laser light is highly coherent, providing a focused and visible point of light.

3. Material Composition: The laser head is constructed from a combination of plastic and brass, offering a balance of durability and lightweight design.

4. Compact Size: With a small head diameter of 12mm and a total length of 23mm, this laser module is compact and easy to integrate into various projects.

5. Versatile Application: The laser head's simple 2-wire connection style and low voltage operation make it versatile for a wide range of applications, including alignment, positioning, leveling, aiming, and visual indication.

6. Optical Power: The laser module has an optical power of 5mW, which produces a bright and visible red dot.

How Lasers Work: Lasers operate based on the principle of stimulated emission. They consist of an active medium (gas or semiconductor) sandwiched between two mirrors. Light within the active medium is stimulated to emit coherent photons, resulting in a concentrated and directional laser beam.

Laser Specifications:

• Beam Diameter: The diameter of the laser beam at the exit face of the laser housing. Typically described using the 1/e2 width, which is the distance between two points on the marginal distribution where the intensity is 1/e2 (0.135) times the maximum intensity value.

• Beam Divergence: Refers to the degree of spreading out of the laser beam as it propagates. The full angle of divergence defines how much the beam spreads over increasing distance from the aperture. Divergence values are specified for different types of laser diodes.

The Red Dot Laser Head can be used in a variety of applications, including educational demonstrations, DIY projects, robotics, laser pointers, visual alignment, and more. When integrating this laser module into projects, safety precautions should be followed to prevent direct exposure of the laser beam to the eyes or skin.