Spectroscopy Lens Holder Assemblies

Getting light into and out of a monochromator or spectrograph is one of the most important considerations when configuring a system. Newport offers a variety of lens holders, both adjustable and stationary, to meet the needs of most applications. Lenses are ordered separately and may be replaced as applications change or evolve.

Adjustable focusing lens assembly
XYZ focusing lens assemblies
XY focusing lens assembly
Spacer tube lens kits

See All Features

Description	Compatibility	Price
77258 Spectroscopy Lens Holder AssembliesFocusing Lens Assembly, X-Y Flanged 2 mm Adjustment	UNIVERSAL	$860
77259 Spectroscopy Lens Holder AssembliesXYZ Focusing Lens Assembly, Req. 38.1 mm Plano-Convex or Bi-Convex Lens	UNIVERSAL	$1,375
77260 Spectroscopy Lens Holder AssembliesXYZ Focusing Lens Assembly, Req. (1) or (2) 25.4 mm Plano-Convex Lenses	UNIVERSAL	$1,720
77330 Spectroscopy Lens Holder AssembliesFocusing Lens Assembly, Req. 1 inch Dia. Lens, 1.5 inch Series Flanges	UNIVERSAL	$255

Features

Adjustable Focusing Lens Assembly

Model 77330 is a useful accessory for Oriel^® monochromators and spectrographs. It re-images a source onto the instrument’s input slit or images the monochromator output onto a detector, fiber or sample. It lacks X-Y image adjustment, so it is best used in arrangements where precision alignment is not required (e.g. large source and targets), or where the adjustments are already available (such as with Oriel research lamp housings). The 77330 features standard Oriel 1.5-in. series female and male flanges so it can mount directly to monochromators and other instruments with enclosed beam paths and aligned optical axes.

This assembly accepts a single 1-in. (25-mm) diameter lens (sold separately). The clear aperture is 0.8 in. (20 mm). The lens is housed inside a lens barrel with a focusing sleeve, with a manual focusing lever to move the lens. Threaded holes in the lens barrel let you set the range of the lever adjust, leading to a total lens adjustment range of 2.9 in. (74 mm). For most imaging applications, we recommend a 32-mm focal length lens. The distance from the flange to the slit plane on our monochromators and spectrographs is 0.74 in. (19 mm). With a 32-mm focal length lens, the F/# of the focused beam is F/4.

Dual-lens XYZ Focusing Lens Assembly

Model 77260 is best used for imaging the output of a monochromator onto a detector or fiber. It features a 20-mm clear aperture, can hold two lenses (sold separately), and includes an integral filter holder and manual shutter. The first lens collimates light from the source or monochromator exit and is adjustable ±0.12 in. (3 mm) in the X and Y directions for precise positioning of the image onto small targets, such as fiber bundles. The second lens focuses the collimated beam and can be adjusted 2.9 in. (74 mm) in the Z axis to focus the light.

Single-lens XYZ Focusing Lens Assembly

The 77259 assembly holds a single lens (sold separately) with X, Y and Z adjustments and is ideally used to focus a collimated source onto a small target, such as a slit, fiber or cuvette. This more economical version of an XYZ focusing lens assembly does not include a filter holder or shutter. Its large 1.3-in. (33 mm) clear aperture provides more than twice the throughput of model 77260. With a plano-convex lens, the 77259 will focus a collimated beam or collimate a diverging beam. With a biconvex lens, it will refocus a beam but will also introduce a significantly higher level of spherical aberrations.

XYZ focusing lens assemblies

To precisely image a source onto a small target, use the 77259 or 77260 focusing assemblies. They are ideal for re-imaging a source onto an Oriel monochromator or spectrograph slit, fiber bundle or cuvette. One of these assemblies may also be used to image the monochromator output onto a detector or fiber. Each model has X, Y and Z adjustments. Both require at least one lens. The lenses are not included; use the Ordering Information Tables as a guide for selecting the proper focal length lens or lenses. Although one can use a single lens in the 77259 to image a source, it is suggested that the light first be collimated and then focused. The two-lens system of the 77260 reduces spherical aberration by a factor of four, because the light is collimated prior to focusing.

The 77260 is best used for imaging the output of a monochromator onto a detector or fiber. It includes an integral filter holder and manual shutter. The 77260 features a 20 mm clear aperture and holds two lenses. The first lens collimates light from the source or monochromator exit, while the second focuses the collimated beam. Lens 1 is adjustable ±0.12 inches [3 mm] in the X and Y directions for precise positioning of the image onto small targets, such as fiber bundles. Lens 2 has 2.9 inches [74 mm] of Z adjustment to focus the light.

The 77259 is ideally used to focus a collimated source onto a small target, such as a slit, fiber or cuvette. This more economical version does not include a filter holder or shutter. The large 1.3-inch [33 mm] clear aperture provides more than twice the throughput of the 77260. The 77259 uses only one lens. With a plano convex lens, the 77259 will focus a collimated beam, or collimate a diverging beam. With a biconvex lens, it will refocus a beam, but introduces a significantly higher level of spherical aberrations.

XY Focusing Lens Assembly

The model 77258 is a simple, adjustable, low cost lens holder. It is frequently used for focusing the output of a collimated source onto a monochromator. The 77258 allows the lens position to be adjusted by 2 mm in the X and Y directions. The large 1.38-in. (35-mm) clear aperture holder is designed as an alternative for those who do not need a lens holder with focus adjustment. The standard Oriel 1.5-in. series female flange couples directly to Oriel spectroscopy instruments, or the 77258 can be rod-mounted using a #1/4-20 threaded hole.

Spacer Tube Lens Kits

Spacer tube lens kits are available to hold a biconvex or plano-convex lens. They may be used in conjunction with the 77258 to focus collimated light into a monochromator or image the diverging output of a monochromator onto a detector. The F/# of the 1.5-in. (38-mm) lens matches the input acceptance cone of the monochromator. This large lens collects all of the output from an Oriel 1.5-in. series light source and is available in glass and fused silica models.

Accessories

Spacer Tube Lens Kits

	Compare	Description	Compatibility	Drawings, CAD & Specs	Avail.	Price
		77321 Focusing Lens Kit, Spacer Tube, 75 mm Focal Length, Fused Silica	UNIVERSAL			$410

1 inch Diameter Focusing Lenses

	Compare	Description	Compatibility	Drawings, CAD & Specs	Avail.	Price
		39213 Focusing Lens, 25.4 mm, N-BK7/A, Bi-Convex, 33 mm FL, Uncoated	UNIVERSAL

1.5 inch Diameter Focusing Lenses

Description	Compatibility	Price
39223 Focusing Lens, 38.1 mm, N-BK7/A, Bi-Convex, 50 mm EFL, Uncoated	UNIVERSAL	$205
39225 Focusing Lens, 38.1 mm, N-BK7/A, Bi-Convex, 75 mm EFL, Uncoated	UNIVERSAL	$130
39323 Bi-Convex Focusing Lens, 38.1 mm, Fused Silica, 51 mm EFL, Uncoated	UNIVERSAL	$415
40540 Focusing Lens, Plano-Convex, 38.1 mm, N-BK7/A, 50 mm EFL, Uncoated	UNIVERSAL	$155
40570 Focusing Lens, Plano-Convex, 38.1 mm, N-BK7/A, 150 mm EFL, Uncoated	UNIVERSAL	$85
41540 Focusing Lens, Plano-Convex, 38.1 mm, UVFS, 50 mm EFL, Uncoated	UNIVERSAL	$265
41570 Focusing Lens, Plano-Convex, 38.1 mm, UVFS, 150 mm EFL, Uncoated	UNIVERSAL	$245