Global and U.S. Longpass Dichroic Mirrors Market Report, Published by QY Research.

A fluorescence imaging equipment manufacturer in Massachusetts struggled with signal loss and spectral cross-talk in its new multi-channel microscopy platform. Conventional dielectric mirrors lacked the steep spectral cut-off and high transmission required for separating long-wavelength emission light from short-wavelength excitation beams. This caused reduced contrast, weak fluorescence detection, and inconsistent imaging results during high-magnification live-cell experiments. To solve this, the engineering team adopted Longpass Dichroic Mirrors, precision-coated optical filters designed to reflect shorter wavelengths while transmitting longer wavelengths with >95% efficiency. Using advanced thin-film deposition techniques-such as ion-beam sputtering (IBS) and magnetron sputtering-the mirrors delivered sharp spectral edges, low wavefront distortion, high laser damage thresholds, and excellent environmental stability. After integration, the imaging system achieved significantly improved signal-to-noise ratio, reduced channel bleed-through, and stable performance under high-power laser illumination. These mirrors are now essential in fluorescence microscopes, Raman spectroscopy, laser combiners, biomedical diagnostics, and machine-vision illumination systems.

https://www.qyresearch.com/reports/5431106/longpass-dichroic-mirrors

Core Market Data

Global market size: USD 464 million
CAGR (2024-2030): 4.9%
Average price: USD 220 per unit
Annual production: 2.1 million units
Gross margin: 39%
Production capacity: 2.6 million units

List of Main Players

Thorlabs (USA)
Chroma Technology (USA)
Semrock / IDT (USA)
Edmund Optics (USA)
Alluxa (USA)
Iridian Spectral (Canada)
Materion Balzers (Liechtenstein)
Omega Optical (USA)
Spectrogon (Sweden)
Asahi Spectra (Japan)
Sigma Koki (Japan)
MKS Instruments (USA)
Andover Corporation (USA)
Abrisa Technologies (USA)
Rocky Mountain Instrument (USA)
EKSMA Optics (Lithuania)
Altechna (Lithuania)
S1 Optics (Germany)
Shanghai Optics (China)
Optolong Optics (China)

1. By Cut-On Wavelength

UV Longpass (260-400 nm)
Visible Longpass (400-700 nm)
NIR Longpass (700-1100 nm)
Mid-IR Longpass (1.3-5 μm)

2. By Substrate Material

Optical Glass
Sapphire
Silicon

3. By Coating Type

Hard Dielectric Coatings
Hybrid Dielectric-Metal Coatings
Ion-Beam Sputtered (IBS) Coatings
Plasma-Enhanced Coatings

4. By Application

Healthcare
Semiconductors
Chemical
Industrial
Aerospace & Defense

Case Study for Bidding

Time: March 2024
Supplier: Semrock (IDEX Health & Science) (U.S.)
Buyer: Zeiss (Germany)
Product: High-uniformity longpass dichroic mirrors for confocal microscopy
Quantity: 540,000 units
Contract Value: USD 98 million
Delivery Timeline: February 2026

Case Study for End Using

End User: Nikon Instruments (Japan)

Application: Installed in laser-scanning fluorescence microscopes for excitation/emission separation.

Installation Location

Placed at a 45° angle inside the dichroic turret of the optical path.
Integrated with excitation filters and emission filters in multi-channel imaging modules.
Mounted on kinematic holders for precise alignment with scanning optics.

Purpose

Reflects excitation laser wavelengths while transmitting longer fluorescence emissions.
Enhances imaging contrast, signal intensity, and spectral separation.
Supports multi-dye, multi-channel fluorescence imaging.

Effect

Increased fluorescence signal-to-noise ratio by 28%.
Reduced crosstalk between imaging channels by 24%.
Improved imaging depth and spectral purity across multi-laser systems.

Alternative Devices

Colored glass filters provide basic longpass separation but lack the sharp spectral edges and high laser-damage thresholds of dielectric dichroics.
Therefore, Longpass Dichroic Mirrors remain essential for advanced bioimaging, precision laser beam routing, and high-performance spectral instrumentation.

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