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Part Number |
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T>90%@580-695nm+R>95%@750-1100nm Shortpass Dichroic Mirror(SPDM722)
SO3060339
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This SPDM722 shortpass dichroic mirror is designed to transmit visible light from 580–695 nm while reflecting a broad range of near-infrared (NIR) wavelengths from 750–1100 nm.
It is suitable for imaging and sensing applications where visible signals in the yellow-to-red range must be isolated from infrared background noise or laser lines. It helps separate beams by wavelength, effectively allowing the visible signal to pass through to the detector while reflecting longer infrared wavelengths, making it an ideal component for hot-mirror applications, machine vision, and protecting sensors from NIR laser interference (such as 1064 nm Nd:YAG).
Key specifications:
- Wavelength / main spec: Transmits 580–695 nm; Reflects 750–1100 nm
- Bandwidth / transition spec: Shortpass dichroic transition between 695 nm and 750 nm
- Transmission / blocking: T >90% (580–695 nm); R >95% (750–1100 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.