Short Pass Filter

Short pass filter descripion

1 Features

• High Transmission: The short pass filter provides high transmission through its designed wavelengths while effectively blocking unwanted ranges.
• Precise Cutoff Wavelength: The filter ensures accurate transmission and rejection based on specific cutoff wavelengths, making it suitable for precision applications.
• Versatile Applications: Primarily used in fluorescence instrumentation, heat rejection, and as a color filter.
• Durability: Designed to withstand harsh conditions with durability and stability in demanding environments.
• Customizable Options: Can be customized based on specific requirements, including customized wavelengths and sizes.

2. General Description

Shape Optics Technologies Pte Ltd offers high-quality Short Pass Filters specifically designed to transmit wavelengths shorter than a designated cutoff wavelength. These filters are widely used in a range of applications including fluorescence instrumentation, heat rejection, and color filtering. A short pass filter blocks wavelengths higher than its cutoff, making it an essential tool for precise wavelength selection. The product’s coatings are engineered with multi-layer dielectric coatings to achieve the required transmission and rejection characteristics. The filters are designed with high durability and are suitable for use in both laboratory and industrial environments. The filters are available in various sizes and specifications to suit different needs, offering high reliability and performance under various environmental conditions.

3. Spectrum Transmission Curves

• Standard components are available for most common applications, but customized filters can be created upon request to meet specific wavelength requirements.

4. Coating Quality

• Adhesion Test: Compliant with MIL-C-675C military standards, the adhesion test involved applying tape that meets LT-90 specifications onto the lens film. After affixing and removing the tape vertically three times, no blistering or peeling occurred.
• Temperature Test: Following MIL-C-675C, test pieces were subjected to temperatures between -62±1℃ and 71±1℃. After two hours at room temperature, the adhesion test showed no film detachment.
• Abrasion Resistance Test: As per MIL-C-675C and CCC-C-440 standards, the film withstood 25 cycles of testing with gauze, without surface damage.
• Humidity Test: Exposed to 49±2℃ and 95%-100% humidity for 24 hours, the film showed no peeling, scratches, or defects.
• Solvent and Cleaning Test: Exposed to acetone and alcohol for 10 minutes, the film showed no signs of peeling or scratching after air drying and cleaning with alcohol-soaked cotton cloth.
• Salt Spray Test: After 100 hours at 35°C in a 5% saltwater concentration, the film remained intact with no signs of damage.

5. Standard Specifications

6. General Applications and Examples

Short pass filters are used extensively in:

• Fluorescence Instrumentation: To select specific wavelengths for exciting fluorophores while blocking undesired wavelengths.
• Heat Rejection: For blocking infrared wavelengths and passing visible light, useful in various applications, including projection systems.
• Color Filtering: Often used in optical systems where specific wavelengths of light are needed, and others are blocked to enhance contrast or image quality.

These filters are essential for applications in UV, VIS, and IR ranges, ensuring precise wavelength management in a wide variety of scientific and industrial setups.

7. SOT Strengths and Capabilities

Shape Optics Technologies Pte Ltd is a leader in manufacturing high-precision optical filters, offering a wide range of customizable filters for various applications. With an emphasis on high transmission, precision, and durability, SOT provides filters tailored for specific wavelength ranges. The company’s commitment to quality control ensures that all filters meet rigorous performance standards and environmental testing.

SOT’s capabilities include the ability to design and manufacture custom filters for various industries, including telecommunications, medical instrumentation, and environmental monitoring. Their production processes involve cutting-edge technology, including multi-layer dielectric coatings, to ensure superior performance in demanding applications.

8. Standard Products

Custom options available upon request.