THz lenses

Silicon lenses

> HSL-12-7.1 - Hyperhemispheric silicon lens

The hyperhemispherical silicon substrate lens ensures a large solid angle Ω= 1.25 sr for the THz radiation in combination with a GaAs PCA chip.
Because this lens delivers a divergent THz beam it must be collimated by an additional lens.

• Diameter: 12 mm
• Thickness: 7.1 mm
• Refractive index: 3.41
• Material: undoped HRFZ-silicon
• Specific resistance: > 10 kΩcm
• Surface: polished
• PCA chip thickness: 0.6 mm
• Data sheet (pdf)
• Price: 150.- €

> CSL-20 - Collimating silicon lens

The elliptic collimating silicon lens is designed for use in connection with a 0.6 mm thick antenna chip.

• Diameter: 20 mm
• Thickness: 13.8 mm
• Refractive index: 3.41
• Material: undoped HRFZ-silicon
• Specific resistance: > 10 kΩcm
• Flat and elliptic surface: polished
• PCA chip thickness: 0.6 mm
• Data sheet (pdf)
• Price: 390.- €

> FSL-D20-f50 -Focusing silicon lens

Focusing elliptic silicon lens with 20 mm diameter and 50 mm focal length.

• Diameter: 20 mm
• Thickness: 14 mm
• Refractive index: 3.41
• Material: undoped HRFZ-silicon
• Specific resistance: > 10 kΩcm
• Flat and elliptic surface: polished
• PCA chip thickness: 0.6 mm
• Data sheet (pdf)
• Price: 390.- €

Special TPX lenses for PCA from BATOP

Using highly transmissive TPX (Polymethylpentene) lenses the THz beam can be shaped.
One TPX lens can collimate the divergent THz beam coming from a hyperhemispherical substrate lens.
With a second TPX lens a sharp THz focus can be realized.
1" diameter TPX lenses can be mounted easily onto a PCA with hyperhemispherical silicon lens,

> CTL-D25mm - Mounted collimating aspheric TPX lens with diameter 25.4 mm

• Lens diameter: 25.4 mm
• Maximum lens thickness: 8.0 mm
• Focal length: 32.5 mm
• Free aperture: 22.4 mm
• Refractive index: 1.45 at 1 THz
• Absorption coeff: 0.3 cm^-1
• Material: TPX (Polymethylpentene)
• Shape: plano-convex (aspheric)
• PCA compatible housing
• Data sheet (pdf)
• Price: 150.- €

> CTLF-D25mm - Mounted collimating aspheric TPX lens for fiber coupled PCA with diameter 25.4 mm

> FTL-f32.5mm - Focusing plano-convex TPX lens

• Lens diameter: 25.4 mm
• Maximum lens thickness: 8.0 mm
• Focal length: 32.5 mm
• Free aperture: 22.4 mm
• Refractive index: 1.45 at 1 THz
• Absorption coeff: 0.3 cm^-1
• Material: TPX (Polymethylpentene)
• Shape: plano-convex (aspheric)
• Compatible with collimating lens
• Data sheet (pdf)
• Price: 150.- €

TPX lenses with 1" and 2" diameter

List of available focusing plano-convex TPX lenses from stock. Other TPX lenses on request.

> TPX-D25.4-f10 , dedicated for spatial high resolution measurements

• Lens diameter: 25.4 mm
• Focal length: 10 mm
• Free aperture diameter: 20 mm
• Refractive index: 1.45 at 1 THz
• Numerical aperture NA: 0.64
• Central lens thickness: 11.2 mm
• Edge thickness: 3.3 mm
• Material: TPX (Polymethylpentene)
• Shape: plano-convex (aspheric)
• Data sheet (pdf)
• Price unmounted: 130.- €
• Price mounted: 150.- €

• Asperic (elliptic) TPX lens
• Focal length: 10 mm
• Free aperture diameter: 20 mm
• F* number: 0.5
• Refractive index: 1.45 at 1 THz
• Numerical aperture NA: 0.64
• Central lens thickness: 11.2 mm
• Material: TPX (Polymethylpentene)
• Spatial resolution at 1 THz: 0.3 mm
• Spatial resolution measurement (pdf)
• Price unmounted: 130.- € / pc
• Price mounted: 150.- € / pc

> TPX-D25.4-f15

• Lens diameter: 25.4 mm
• Focal length: 15.0 mm
• Free aperture diameter: 23.4 mm
• Refractive index: 1.45 at 1 THz
• Numerical aperture NA: 0.59
• Central lens thickness: 8.0 mm
• Edge thickness: 1.6 mm
• Material: TPX (Polymethylpentene)
• Shape: plano-convex (aspheric)
• Data sheet (pdf)
• Price unmounted: 130.- €
• Price mounted: 150.- €

> TPX-D25.4-f25

• Lens diameter: 25.4 mm
• Focal length: 25.0 mm
• Free aperture diameter: 22.4 mm
• Refractive index: 1.45 at 1 THz
• Numerical aperture NA: 0.38
• Central lens thickness: 8.0 mm
• Edge thickness: 3.1 mm
• Material: TPX (Polymethylpentene)
• Shape: plano-convex (aspheric)
• Data sheet (pdf)
• Price unmounted: 130.- €
• Price mounted: 150.- €

> TPX-D25.4-f32.5

• Lens diameter: 25.4 mm
• Focal length: 32.5 mm
• Free aperture diameter: 22.0 mm
• Refractive index: 1.45 at 1 THz
• Numerical aperture NA: 0.3
• Central lens thickness: 8.0 mm
• Edge thickness: 4.2 mm
• Material: TPX (Polymethylpentene)
• Shape: plano-convex (aspheric)
• Data sheet (pdf)
• Price unmounted: 130.- €
• Price mounted: 150.- €

> TPX-D25.4-f50

• Lens diameter: 25.4 mm
• Focal length: 50.0 mm
• Free aperture diameter: 22.4 mm
• Refractive index: 1.45 at 1 THz
• Numerical aperture NA: 0.21
• Central lens thickness: 7.0 mm
• Edge thickness: 4.4 mm
• Material: TPX (Polymethylpentene)
• Shape: plano-convex (aspheric)
• Data sheet (pdf)
• Price unmounted: 130.- €
• Price mounted: 150.- €

> TPX-D25.4-f67

• Lens diameter: 25.4 mm
• Focal length: 67 mm
• Free aperture diameter: 22.4 mm
• Refractive index: 1.45 at 1 THz
• Numerical aperture NA: 0.16
• Central lens thickness: 6.94 mm
• Edge thickness: 5.0 mm
• Material: TPX (Polymethylpentene)
• Shape: plano-convex (aspheric)
• Data sheet (pdf)
• Price unmounted: 130.- €
• Price mounted: 150.- €

> TPX-D25.4-f100

• Lens diameter: 25.4 mm
• Focal length: 100 mm
• Free aperture diameter: 22.4 mm
• Refractive index: 1.45 at 1 THz
• Numerical aperture NA: 0.107
• Central lens thickness: 7.0 mm
• Edge thickness: 5.7 mm
• Material: TPX (Polymethylpentene)
• Shape: plano-convex (aspheric)
• Data sheet (pdf)
• Price unmounted: 130.- €
• Price mounted: 150.- €

> TPX-D25.4-f150

• Lens diameter: 25.4 mm
• Focal length: 150 mm
• Free aperture diameter: 22.4 mm
• Refractive index: 1.45 at 1 THz
• Numerical aperture NA: 0.072
• Central lens thickness: 6.0 mm
• Edge thickness: 5.1 mm
• Material: TPX (Polymethylpentene)
• Shape: plano-convex (aspheric)
• Data sheet (pdf)
• Price unmounted: 130.- €
• Price mounted: 150.- €

> TPX-D50-f35

• Lens diameter: 50.0 mm
• Focal length: 35.0 mm
• Free aperture diameter: 47.0 mm
• Refractive index: 1.45 at 1 THz
• Numerical aperture NA: 0.54
• Central lens thickness: 18 mm
• Edge thickness: 3.0 mm
• Material: TPX (Polymethylpentene)
• Shape: plano-convex (aspheric)
• Data sheet (pdf)
• Price unmounted: 220.- €
• Price mounted: 250.- €

> TPX-D50.8-f65

• Lens diameter: 50.8 mm
• Focal length: 65.0 mm
• Free aperture diameter: 47.8 mm
• Refractive index: 1.45 at 1 THz
• Numerical aperture NA: 0.33
• Central lens thickness: 13 mm
• Edge thickness: 4.1 mm
• Material: TPX (Polymethylpentene)
• Shape: plano-convex (aspheric)
• Data sheet (pdf)
• Price unmounted: 220.- €
• Price mounted: 250.- €

> TPX-D50.8-f100

• Lens diameter: 50.8 mm
• Focal length: 100 mm
• Free aperture diameter: 47.8 mm
• Refractive index: 1.45 at 1 THz
• Numerical aperture NA: 0.23
• Central lens thickness: 10 mm
• Edge thickness: 4 mm
• Material: TPX (Polymethylpentene)
• Shape: plano-convex (aspheric)
• Data sheet (pdf)
• Price unmounted: 220.- €
• Price mounted: 250.- €

> TPX-D50.8-f200

• Lens diameter: 50.8 mm
• Focal length: 200 mm
• Free aperture diameter: 47.8 mm
• Refractive index: 1.45 at 1 THz
• Numerical aperture NA: 0.12
• Central lens thickness: 8.3 mm
• Edge thickness: 5.0 mm
• Material: TPX (Polymethylpentene)
• Shape: plano-convex (aspheric)
• Data sheet (pdf)
• Price unmounted: 220.- €
• Price mounted: 250.- €