Tsurupica THz Lens - Broadband，Inc.

Tsurupica ^TM⁽Terahertz Super lens) has extremely higher transmission and lower absorption at the wavelength of VIS and THz than conventional material such as polyethylene . This lens is invented by Tera-Photonics Research Team Photo-Dynamics Research Center at RIKEN ( http://www.riken.go.jp/lab-www/tera/index.html )

The lens is made of transparent material and has the same refractive index at both THz region and visible wavelength. So the beam propagation of invisible THz wave can be visualized and traceable by He-Ne laser. (see the transmission data below)

The second key feature is Tsurupica doesn't have the strong absorption that Polyethylene has, so this material is suitable for window of cryostat or bolometers.

Fresnel loss is also lower than that of Si substrate.

For further information, please contact ask@bblaser.com

Key Features:

No absorption around 2THz ( Polyethylene has strong absorption around 2THz)
High transmission for both VIS and THz region
Freq. Range: upto 12THz
Same refractive index at THz & Visible range : 1.52 @ THz wave 1.52 @ Visible wave
Suitable for window of Bolometer, cryostat, detector or chamber
Aperture: upto 100mm or 4" as standard size
Concave, convex, Bi-convex, cylindrical, Aspheric, wedge plate, prism, sample plate, etc..

Product Line Up We have the following three types of the surface finish.

Type	surface finish	surface roughness	comment
Tsurupica-RR	Optically polished	<0.05um	VIS range can be transmitted without any distortion of beam profiles.
Tsurupica-R	Rough polished	<0.30um	Performance at THz is the same as above. VIS range still can be transmitted.
Tsurupica-S	Unpolished	-	Affordable THz lens and effective for block VIS right

Standard products

Standard Products List

PDF Data

Catalog

Chemicals proof

Transmission_data

Transmission data: Tsurupica has no absorption around 2 THz

See the detail data, click the following picture !

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