Laser filter

Borisun Optics specializes in producing or customizing laser harmonic dichroic mirror, spectroscope, dichroic filter, or harmonic spectroscope. It is used to separate the harmonics of Nd: YAG laser beam. There are four available wavelength configurations:


1. 1064 nm reflection, 532 nm transmission

2. 532 nm reflection, 1064 nm transmission

3. 355 nm reflection, 532 and 1064 nm transmission

4. 266 and 355 nm reflection, 532 and 1064 nm transmission


The reflected beam splitting film is plated on the front surface of the glass substrate, and the rear surface is ar antireflection film for transmission wavelength. The optimal angle of incidence (AOI) of both coatings is 45 degrees.


The rear surface coated with AR antireflection film can reduce unnecessary interference effects (such as ghosting), which is caused by the mutual interference of reflected light on the front and rear surfaces. On an uncoated substrate, about 4% of the light with an incident angle of 45 degrees is reflected; The reflection ratio can be reduced to less than 1% by plating antireflective film on the back surface of the beam splitter.

532nm laser filter
Technical parameters
Items Parameters
Product index customizable
Substrate quartz, K9 and other optical glass
Luminous aperture > 90%
Parallelism < 30″
Surface shape λ/ 4 or λ/ 10 @ 632.8nm per 25mm
Coating one side is coated with medium beam splitting film, and the other side with antireflection film
Incident angle 45°
Surface quality 40-20
Damage threshold > 5J / cm2, 20ns, 20Hz, @ 1064nm
spectral curve

In addition, We can customize the optical filters according to customer requirements or drawings.

For details, please consult:

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