A glass prism is a type of prism made of transparent material, such as optical glass, with two refractive surfaces and a bottom surface. It is mainly used to control the optical path, adjust the imaging direction, or achieve specific functions, such as polarization splitting or image correction. It ensures optical performance through adhesive coating and precision machining, and is commonly used in instruments such as microscopes and telescopes.
Core Features
Structural design: It is usually composed of two or more prisms glued together, and the glued surface is often coated with a polarizing beam splitter film or a reflective film.
Optical function: It can achieve light turning, image direction adjustment, or polarization splitting (such as splitting unpolarized light into two perpendicular linearly polarized beams).
Processing requirements: The bonding process must strictly control temperature, humidity, and cleanliness to avoid bubbles or delamination and ensure imaging quality.
Typical Applications
Microscope: Used for binocular observation systems, it achieves dual image overlap through laminated prisms to improve imaging clarity.
Telescope: Like a periscope, it changes the direction of the light path by gluing right angled prisms together.
Polarization splitting: Separating or combining polarized light in optical instruments for spectral analysis or imaging systems.
Materials and Processes
Material: Commonly used transparent materials such as glass and crystal, with a polarizing or reflective film coated on the bonding surface.
Process: It needs to be carried out in a dust-free environment. Before bonding, the prism surface needs to be cleaned, and after bonding, the optical path needs to be corrected to ensure that the imaging is not tilted.
Precautions
Maintenance: Avoid wiping the coated surface with gauze and use a rubber blower or soft bristled pen for cleaning; When heating, the temperature should be controlled to prevent the film layer from getting damp or falling off.
Storage: After coating, it is necessary to bond it as soon as possible. Long term storage can easily cause the film layer to become damp or contaminated, affecting the quality of bonding.
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