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Part Number |
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T>90%@410-510nm+R>99%@800-890nm,Shortpass Dichroic Mirror(SPDM655)
SO3060488
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This SPDM655 shortpass dichroic mirror is designed to transmit visible blue and green light from 410–510 nm while reflecting near-infrared wavelengths from 800–890 nm.
It is suitable for fluorescence imaging, machine vision, and optical sensing systems using NIR illumination or 808 nm and 850 nm laser sources. It helps separate beams by wavelength, effectively allowing the shorter visible signal to pass through while reflecting unwanted near-infrared background or excitation light to protect detectors and improve image contrast.
Key specifications:
- Wavelength / main spec: Transmits 410–510 nm; Reflects 800–890 nm
- Bandwidth / transition spec: Shortpass dichroic transition between 510 nm and 800 nm
- Transmission / blocking: T >90% (410–510 nm); R >99% (800–890 nm)
- Format / custom option: Available in mounted (dia 12.5–25 mm) and unmounted (25x36 mm to 35x52 mm) formats
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Product Faqs
What does a dichroic mirror do?
A dichroic mirror separates light by wavelength. It is designed to reflect one wavelength range while transmitting another wavelength range.
For example, a dichroic mirror may reflect a laser wavelength while transmitting a visible alignment beam, fluorescence signal, or another laser wavelength. The exact function depends on the reflection band, transmission band, and angle of incidence.
What angle of incidence should I use?
Most dichroic mirrors are designed for a specified angle of incidence, commonly 45°, unless otherwise stated.
Can this dichroic mirror be used to combine or separate laser beams?
Yes. Dichroic mirrors are commonly used for laser beam combining and beam separation when the wavelengths are different enough and the reflection/transmission bands match the system requirement.
For example, one wavelength may be reflected at 45°, while another wavelength passes through the mirror. Before ordering, please confirm the laser wavelengths, AOI, beam size, and required reflection/transmission performance.
Not sure if this product fits your setup?
Whether you are replacing an existing part or building a new system, send us:
- Original part number or target specification
- Required size and quantity
- Application or system goal
We will help check product fit or suggest a stock/custom alternative.