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Ellipsoidal and Paraboloidal Reflectors
Ellipsoidal and Paraboloidal Reflectors
These accurately replicated reflectors are designed for many light collection and illumination applications. Their broad 200 nm to 10 µm spectral range makes them usable for applications where lenses are either too costly or are limited by their transmissive properties. We offer parabolas, off-axis parabolas, and ellipses, which all provide very efficient radiation control since focus or collection is over very large solid angles.
- Collect and focus or collimate UV to far IR radiation efficiently
- Economical alternative to IR lens materials
- No chromatic aberrations
- Easily rod mounted
- Efficient over a much broader spectral range See All Features
Features
Reflective Optic Advantages
Reflective optics hold several advantages over refractive optics. In particular, ellipsoidal and paraboloidal reflectors allow you to focus to very small spots, and they are considerably more efficient than spherical reflectors. Though these reflectors are very close to ideal reflectors, they are not recommended for critical imaging applications.
Reflectance of bright rhodium
Electro-deposited Nickel with Bright Rhodium Coating
Our reflectors are made of electro-deposited nickel replicated from a precision master. The substrates are typically 0.03 inch (0.76 mm) thick. The bright rhodium coating has good reflectance in the UV and visible range, and excellent reflectance from the near to far IR.
Ellipsoidal Reflectors
These reflectors have two conjugate foci. Light from one focus passes through the other, after reflection. Ellipsoids collect a much higher fraction of total emitted light than a spherical mirror or conventional lens system. The effective collection f/#s are very low, and the geometry is well suited to the small source size of an arc lamp. Two ellipsoids can almost fully enclose a light source and target to provide nearly total energy transfer.
Paraboloidal Reflectors
Paraboloidal reflectors collect radiation from a source at its focal point and reflect it as a collimated beam, parallel to the axis. Alternatively, they can tightly focus a collimated beam at its focus.
Off-Axis Paraboloidal Reflectors
Our off-axis paraboloidal reflectors are a circular segment from one side of a full paraboloid. The focal point is off the mechanical axis, giving full access to the reflector focus area. There are no shadowing problems if a detector or source is placed at the focus.
