Long Wave Pass Filter

At Optical Filter Shop, we design our long wave pass (LWP) filters to separate the light spectrum into reflected and transmitted components. Also known as an edge filter, LWP filters contain either a cut-on or cut-off slope that defines the transition between a highly reflective and a highly transmitted region. We use a technologically advanced sputtering method to apply multi-layer coatings to our filters, providing superior durability and stability in the highest-output light settings.

Contrary to the designs of conventional colored glass filters or polymer gels, our long wave pass filters are absorption-free, using thin-film interference technology to emit the richest possible colors. These filters also contain an increased edge steepness between wavelength bands to allow for accurate wavelength measurement.

Some popular applications of long wave pass filters include:

• Microscopy
• Fluorescence instrumentation
• Raman spectroscopy
• Light engines and broadband illumination
• Original equipment manufacturer (OEM) optical systems

Purchase Long Wave Pass Optical Filters

Optical Filter Shop stocks a wide variety of LWP filters for performance in the visible (VIS), ultraviolet (UV), infrared (IR) and near-infrared (NIR) wavelengths. We can customize our LWP filters to match your application’s specific wavelength and angle requirements to deliver the targeted blocking you need. In addition to our innovative coatings, we can customize our LWP filters by cutting them into various shapes and sizes.

Several benefits of buying long wave pass filters from Optical Filter Shop are:

• High-transmission properties produce peak visibility
• Rejection of unwanted wavelengths prevents damage
• Maintain color integrity without shifting
• Provide superior stability in high-humidity and elevated temperatures
• Fully customizable

Our stock LWP filters are the perfect alternative to costly sample fabrication when you need a quick, economic prototype. If we have the filter you need in stock, we can usually ship it out within one business day.

Custom Long Wave Pass Filter Options

Our engineering team has decades of experience using optical solutions and thin-film technology to develop custom filters specific to your application. Our designers will focus on your requirements by considering operating temperatures, humidity ranges, equipment limitations, manufacturing tolerances and other critical factors. Our top priority is maximizing the performance and improving the efficiency of your operation.

Many of our customization processes involve applying multiple coatings to the same filter to enhance the size and weight. For more complex applications, filter designs can combine to produce the desired effect. Long pass and short pass filters can stack to create a custom bandpass filter.

Other filters that can pair with LWP filters include:

• IR filters: These filters block IR radiation to reduce heat while transmitting visible light.
• Cold mirrors: Cold mirrors reflect visible light while transferring heat outside or to the rear of the filter.
• Color correction filters: These filters adjust the temperature of a specific color to produce the desired effect.

Connect With Optical Filter Shop for Your Long Wave Pass Filter Needs

Whether you need a stock LWP filter, a custom design specific to your operation or a quotation on a high-volume run, the staff at Optical Filter Shop is ready to serve you. Contact us today to learn how we can help your operation succeed.