Parallex pin (Index pin)

A parallax pin, also known as an optical needle, is an instrument used in optical experiments, particularly on optical benches. It’s a pointed needle, often mounted on a rod, designed for precise measurements and observations of optical phenomena. It’s used to determine the parallax or apparent displacement of an object when viewed from different positions, allowing for accurate positioning and alignment of other components in an optical setup. Purpose:Parallax pins help in identifying the position of an object or component in an optical system by allowing for precise observation of its apparent displacement against a background when viewed from different angles.

An optical pin is a small, precise instrument typically used in optical experiments, especially in physics labs. It’s often used to demonstrate concepts like reflection, refraction, and image formation, and is typically placed in a setup to mark specific points along the optical axis.
Size: this pin is 6mm in diameter. It’s often a thin, straight, and sharp-ended pin that can be easily inserted into a board or optical setup. The top end may have a small visible marking for easier alignment.
Material: Optical pins are usually made from metal, like stainless steel, to ensure durability and precision. The surface may be polished to reduce light interference.
Usage: The pin is often used in combination with optical benches or other optical equipment. It’s usually placed on the optical bench to mark a reference point for the path of light in experiments. The pin serves as a point of observation for measuring angles or distances in various optical setups.