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T>90%@450-495nm+R>99%@515-600nm,Shortpass Dichroic Mirror(SPDM500)
SO3060521
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This SPDM500 shortpass dichroic mirror is designed to transmit blue light from 450–495 nm while reflecting longer wavelengths from 515–600 nm.
It is suitable for fluorescence imaging, beam combining, and optical inspection systems using 450 nm blue LED or blue laser illumination. It helps separate beams by wavelength, effectively allowing the shorter-wavelength blue signal to pass through while reflecting green and yellow wavelengths, which is ideal for isolating excitation light from emission signals or routing multiple laser lines.
Key specifications:
- Wavelength / main spec: Transmits 450–495 nm; Reflects 515–600 nm
- Bandwidth / transition spec: Shortpass dichroic transition between 495 nm and 515 nm
- Transmission / blocking: T >90% (450–495 nm); R >99% (515–600 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.