Features

• Round Geometry Enables Easy Mounting and Adjustment
• Pre-Mounted and Aligned in an Engraved, Black Anodized Aluminum Ring
• Full Contact Between Mounting Cell and Retaining Rings
• Fabricated from N-BK7 Glass
• Focal Lengths from 50 mm to 1000 mm Available
• SM1 Lens Tube Compatible
• Enable Magnification in One Dimension
• Collimates & Circularizes the Output of a Laser Diode

Like our N-BK7 plano-convex cylindrical lenses, these Ø1" positive round cylindrical lenses can be used to focus light but only in one dimension. However, they have the added advantage that they are epoxied into a round cell, allowing them to be mounted in our SM1 Lens Tubes or any Ø1" Lens Mounts.

The cell is black anodized and engraved with the part number, focal length, and coating information (if applicable). The wall thickness is designed to allow full contact with the cylindrical lens when using an SM1RR retaining ring to hold the lens.

One possible application is to use these lenses to focus fluorescence from a gas cell into a thin line imaged onto a photomultiplier tube. Alternatively, pairs of cylindrical lenses can be used to collimate and circularize the output of a laser diode. To minimize the introduction of spherical abberations, collimated light should be incident on the curved surface when focusing it to a line, and a line source should be incident on the plano surface when collimating.

Item #*	Focal Length**	Back Focal Length	Radius	Center Thickness	Center Thickness	Working Distance**	Reference Drawing
LJ1695RM	50 mm	45.5 mm	25.8 mm	6.8 mm	8.3 mm	44.2 mm
LJ1703RM	75 mm	67.4 mm	38.8 mm	11.5 mm	12.7 mm	66.4 mm
LJ1567RM	100 mm	96.6 mm	51.7 mm	5.2 mm	8.2 mm	95.2 mm
LJ1629RM	150 mm	147.1 mm	77.5 mm	4.5 mm	5.8 mm	145.7 mm
LJ1653RM	200 mm	197.3 mm	103.4 mm	4.1 mm	5.8 mm	196.0 mm
LJ1267RM	250 mm	245.7 mm	129.2 mm	6.5 mm	8.3 mm	244.3 mm
LJ1558RM	300 mm	297.7 mm	155.1 mm	3.8 mm	5.8 mm	296.3 mm
LJ1363RM	400 mm	397.7 mm	206.7 mm	3.5 mm	5.8 mm	396.3 mm
LJ1144RM	500 mm	497.7 mm	258.4 mm	3.4 mm	5.8 mm	496.4 mm
LJ1516RM	1000 mm	997.9 mm	516.8 mm	3.2 mm	5.8 mm	996.5 mm

*For AR-coated lenses, the same radius of curvature and center thickness applies as listed above for the uncoated version.
**All focal lengths are specified at the design wavelength (587.6 nm). Since the index of refraction for N-BK7 is inversely proportional to the wavelength, the focal length of each lens increases with increasing wavelength.

Click to Enlarge
Click Here for Raw Data

All of our round cylindrical lenses can be ordered uncoated or with one of the following broadband AR coatings: -A: 350 - 700 nm, -B: 650 - 1050 nm
or -C:1050 - 1620 nm.

These high performance multilayer AR coatings have an average reflectance of less than 0.5% (per surface) across the specified wavelength ranges. The central peak in each curve is less than 0.25%. These coatings are designed for use with angles of incidence (AOI) between 0 and 30 degrees (0.5 NA). For optics intended to be used with larger incident angles, consider using a custom coating optimized for a 45 degree AOI; these coatings are effective for use with angles of incidence between 25 and 52 degrees. The plot shown below indicates the performance of the standard coatings in this family as a function of wavelength. Broadband coatings have a typical absorption of 0.25%, which is not shown in the reflectivity plots.