The LP650nm filter is a long-pass filter that primarily functions to allow light with wavelengths greater than or equal to 650nm to pass through while blocking short-wavelength light below 650nm. This type of filter is widely used in medical aesthetics, iris recognition, digital imaging, stage lighting, multi-band detection, and other fields.

I. Working Principle

The LP650nm filter is manufactured using ion-assisted vacuum evaporation coating technology, leveraging the optical interference principle of multilayer dielectric films to achieve selective transmission of specific wavelength ranges. It features steep transition bands, high transmittance, high film hardness, and long lifespan, offering superior optical performance compared to traditional colored glass.

II. Product Features

• High Transmittance: Transmittance can reach over 92% within the transmission band;

• High Blocking Depth: Blocking depth for short wavelengths can reach OD6, effectively suppressing stray light;

• Durable Coating: Utilizes vacuum coating technology, resulting in dense, scratch-resistant, and mold-resistant films;

• Customizability: Supports customization of different sizes, thicknesses, and shapes (circular/square).

III. Typical Applications

• Medical Aesthetics: Used in IPL photon rejuvenation, laser hair removal, and other devices to filter the required treatment wavelengths;

• Iris Recognition: Filters environmental light interference to improve recognition accuracy;

• Digital Imaging: Enhances image contrast and color reproduction;

• Stage Lighting: Used for color control in lighting to create specific visual effects;

• Multi-Band Detection: Applied in industrial detection equipment to enhance target identification capabilities.