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Unmounted N-BK7 Ground Glass Diffusers
(100 mm x 100 mm)
For improved transmission, our Ø1" diffusers are also available with either an AR coating for 350 - 700 nm or 650 - 1050 nm. When positioning the diffusers, the grit-polished side should face away from the source.
Polished diffusers are advantageous over sand blasted diffusers, as the surface has greater uniformity. The various grits provide a range from fine to coarse scattering. A finer grit (e.g. 1500) has a small diffusion pattern, while a coarser grit (e.g. 120) will have a larger diffuser pattern. See the plot below to compare the performance of our diffusers and the Graphs tab to see the transmission through the diffusers.
Please see the Application Idea tab for a Diffused LED Condenser that uses a ground glass diffuser. For applications requiring specific divergence angles, spatial distribution of the illumination, and intensity profiles, our engineered diffusers are more suitable. Thorlabs also offers UV Fused Silica Diffusers for applications that extend into the ultraviolet portion of the spectrum.
Please note that the transmission values are affected by the manner in which the data is collected. An integrating sphere is used along with a spectrometer, and as the grit values get smaller the light is more dispersed, making it difficult to collect all of the light into the spectrometer. Therefore, lower grit values will appear to have a lower transmission.
Build Your Own Collimated LED Source
To integrate the MWWHL4 Warm White Mounted LED, which has internal SM1 (1.035"-40) threading, into the 60 mm cage system, the mounted LED was threaded into an LCP02 30 mm-to-60 mm cage plate adapter using an SM1T2 Lens Tube Coupler. Next, the light source is directed through a Ø2", 600 grit ground glass diffuser, which is held in place by two SM2RR Retaining Rings on an LCP01 60 mm Cage Plate. After exiting the diffuser, the divergent light is collimated using an LA1401 Plano Convex Lens with a focal length of 60.0 mm. The lens is also housed in an LCP01 60 mm Cage Plate.
The entire 60 mm cage assembly is mounted onto a TR3 post using the 8-32 thread on the bottom of the LCP01, placed in a PH3 post holder, and attached to the breadboard using a BA2 Mounting base.
The tables below correspond to either the imperial or metric list of components needed to build a Diffused LED Condenser.