Reflectance spectrum graph with a peak at around 500 nm on a white background

T＞90%@480-580nm+R＞99%@600-1100nm,Shortpass Dichroic Mirror(SPDM590)

T＞90%@480-580nm // R＞99%@600-1100nm / dia12.5mm(mounted)
$55.00
$55.00
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Reflectance spectrum graph with a peak at around 500 nm on a white background
  • Reflectance spectrum graph with a peak at around 500 nm on a white background
T＞90%@480-580nm+R＞99%@600-1100nm,Shortpass Dichroic Mirror(SPDM590)

T＞90%@480-580nm+R＞99%@600-1100nm,Shortpass Dichroic Mirror(SPDM590)

SO3060499
Transmission Range // Reflection Range
Transmission Range // Reflection Range
T＞90%@480-580nm // R＞99%@600-1100nm
In stock
$55.00
$55.00
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Stock Availability

Yes. Listed filters are generally available from stock, but final availability may depend on size and quantity.

  • Most filters are kept as medium-sized coated pieces
  • Final size is usually diced before shipment
  • Preparation time may vary for urgent orders, custom sizes, or larger quantities
Custom Size & Mounting

We can usually cut optical filters to custom outer sizes, depending on available coated material.

Custom size
  • Typical custom size range: 3 × 3mm to 60 × 60mm
  • Custom sizing changes the outer dimension only
  • Thickness normally follows the original filter specification
  • Final feasibility depends on coated material size and cutting requirements
Mounting
  • Standard mounting options may be available on request
  • Mounted options can include non-threaded or threaded mounts
  • Custom mounting may be possible depending on quantity and mechanical requirements
Note
  • Please send the required size, quantity, mounting type, and product link before ordering.
Request Raw Data

Yes. You may request the transmission curve or related spectral data for engineering review.

Copy the link of the product page and send email to shop@syronoptics.com, you will get reply within 1 working days.
Shipment & Delivery

We ship optical products to most supported regions, with shipping cost and delivery method confirmed before payment.

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Import, Duties & Customs

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  • Import-handled delivery may be available for selected regions
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  • This option may be slower than express courier
Note
  • If you are not sure, please contact us to confirm whether import-handled delivery is supported in your region.

This SPDM590 shortpass dichroic mirror is designed to transmit green and yellow visible light while reflecting longer red and near-infrared (NIR) wavelengths.

It is highly effective for fluorescence microscopy, multi-spectral imaging, and laser beam steering. This mirror is particularly useful in setups that need to isolate green emission signals—such as those from Alexa Fluor 488 or FITC—while providing robust rejection of red excitation lasers (633 nm, 647 nm) or NIR pump sources (980 nm, 1064 nm). This ensures a high signal-to-noise ratio by preventing long-wavelength interference from reaching the detector.

Key specifications:

  • Wavelength / main spec: 590 nm transition point (SPDM590)
  • Bandwidth / transition spec: Transmits 480–580 nm; Reflects 600–1100 nm
  • Transmission / blocking: T >90% for 480–580 nm; R >99% for 600–1100 nm
  • Format / custom option: Available in mounted (dia 12.5–25 mm) and unmounted (25x36–35x52 mm) formats; custom sizes available on request
SPDM590 Shortpass Dichroic Mirror - Laser Beam Combining or Splitting

SPDM590 Shortpass Dichroic Mirror - Laser Beam Combining or Splitting

A Shortpass Dichroic Mirror (SPDM590) is a highly specialized optical tool that acts like a color-sorting traffic cop for light. "Shortpass" means it allows "shorter" light wavelengths—specifically cyan, green, and yellow light (480-580nm)—to pass straight through it like a clear glass window (transmitting over 90% of it). At the same time, it acts as a perfect mirror for "longer" wavelengths, bouncing back red and near-infrared light (600-1100nm) with over 99% efficiency. The "590" indicates the transition point: right around 590 nanometers (orange light), the filter stops acting like a window and starts acting like a mirror.

Application - Laser Beam Combining or Splitting

In complex optical systems, engineers often need to mix two completely different colored laser beams into a single, perfectly aligned path (or do the reverse and split a mixed beam). Because this mirror is virtually transparent to green/yellow light but highly reflective to red/infrared light, it can seamlessly merge a green laser beam with an infrared laser beam without losing the power or intensity of either one.

Recommended light source:

  • 532nm Green DPSS Laser: This is a very common, stable laser used in research and industry. Its advantage is that its wavelength falls perfectly into the mirror's "pass-through" window (480-580nm), meaning the light travels through the glass with almost zero energy loss.
  • 1064nm Nd:YAG Infrared Laser (or 633nm Red HeNe Laser): These are standard industrial and scientific lasers. Their advantage is that they fall perfectly into the mirror's "reflection" zone (600-1100nm). When angled correctly, this light bounces off the mirror perfectly to join the path of the green laser.
SPDM590 Shortpass Dichroic Mirror - Live-Cell Imaging and Optogenetics

SPDM590 Shortpass Dichroic Mirror - Live-Cell Imaging and Optogenetics

Application - Live-Cell Imaging and Optogenetics

Biologists use light to control cell behavior (a field called optogenetics) while recording video of the cells. The SPDM590 allows researchers to shine stimulating green or yellow light directly through the mirror onto the cells. At the same time, harmless near-infrared light is used to illuminate the scene; this infrared light bounces off the cells, hits the dichroic mirror, and is reflected straight into a sensitive observation camera without the two signals interfering with one another.

Recommended light source:

  • 561nm Yellow-Green LED or Laser: The advantage here is that this specific wavelength is highly effective at activating certain biological proteins, and it easily passes through the SPDM590's transmission window without being blocked.
  • 850nm Near-Infrared LED: The advantage of near-infrared light is that it is totally invisible and harmless to living cells, meaning it won't disturb their natural behavior. It also falls perfectly into the mirror's high-reflection zone, guaranteeing a bright, high-contrast image for the recording camera.

Similar Bandpass Filters

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.