OPTICAL MIRRORS Lens Selection Guide SPHERICAL AND ASPHERICAL LENSES BEAMSPLITTERS Lens Shape IDENTICAL PLANO-CONVEX LENSES paraxial image plane IDENTICAL ACHROMATIC DOUBLETS paraxial image plane paraxial image plane Positive Lenses Plano-Convex Achromatic Doublet Cylindrical Plano-Convex D–Good Ø–Better t–Best Conjugate Ratio (object/image) When using a positive lens to focus a collimated beam, the f/number the lens is operating at becomes important. At f/10 or greater, the lens shape is not that critical to spot size. At f/2, an achromatic doublet provides the smallest focused spot while the other lens shapes will not be diffraction limited. CLEANING & OTHER LAB ESSENTIALS Email: [email protected] • Web: newport.com OPTICAL MODULATORS MULTI-ELEMENT OPTICAL ASSEMBLY Negative Lenses BEAM EXPANDERS Conjugate Ratio (object/image) CYLINDRICAL & OPTICAL WINDOWS & ACHROMATIC LENSES DIFFRACTION GRATINGS SYMMETRIC BI-CONVEX LENS Choosing the right lens shape is critical in order to minimize the optical aberrations. Multiple lenses can be used where one singlet can cancel the aberration caused by another. Generally, when working at or near infinite conjugate (collimated light on one end of the lens), a plano-convex/concave lens or achromatic doublet lens will work best. When working at finite conjugates close to 1:1 ratio, a bi-convex/concave lens would be more ideal. Sometimes using two lenses at infinite conjugate back to back provides even better performance at conjugates near 1:1. Given the available variety of choices, specifying and selecting the proper lens for any given application can be a challenging task. There are a few features to take into consideration when choosing your lenses, including conjugate ratio, lens shape, f/number, lens material, transmission, wavefront distortion, scattered light, types of coating, and cost. This guide will help you compare the available options Newport has to offer.

SPHERICAL AND ASPHERICAL LENSES OPTICAL MIRRORS Positive Lenses BEAMSPLITTERS WAVEPLATES AND POLARIZERS PRISMS AND RETRO-REFLECTORS OPTICAL WINDOWS & CYLINDRICAL & DIFFRACTION GRATINGS ACHROMATIC LENSES BEAM EXPANDERS MULTI-ELEMENT OPTICAL ASSEMBLY OPTICAL MODULATORS Achromatic Doublet Cylindrical Plano-Convex CLEANING & OTHER LAB ESSENTIALS An array of shapes and sizes are offered for most substrates, and it is important to choose the right lens type in order to minimize optical aberrations. Lenses are offered in one of the following configurations: Plano-Convex Lenses are the best choice for...

Achromatic Doublet Cylindrical Lenses Plano-Convex Aspherical Lenses • Anti-Reflection Coating (AR coating) Newport offers an extensive range of antireflection coatings covering the ultraviolet, visible, near infrared, and infrared regions. For most uncoated optics, approximately 4% of incident light is reflected at each surface, resulting significant losses in transmitted light level. Utilizing a thin film anti-reflection coating can improve the overall transmission, as well as minimizing stray light and back reflections throughout the system. The AR coating can also prevent the corresponding...

OPTICAL MIRRORS SPHERICAL AND ASPHERICAL LENSES Only available on UV fused silica lenses Available on achromats, KPX series, and Cylindrical lenses Best choice for broadband visible applications Great choice for broadband UV to visible applications Excellent for NIR laser diode applications Ideal for telecom laser diode applications Highest transmission at a single wavelength Highest transmission at a single wavelength Highest transmission at a single wavelength Laser Line • Optical Materials see page 1423 • Optical Surfaces see page 1429 • Laser Line Antireflection V-Coatings see page 709 •...

• Rmax <0.25% at a single wavelength • Highest transmission efficiency SPHERICAL AND ASPHERICAL LENSES Through careful optimization, these durable, thin films coatings reduce surface losses to typically less than 0.2%. Valuable laser energy is efficiently transmitted through complex optical systems rather than being lost to surface reflection and scatter. This superior performance, however, is achieved at the cost of reduced wavelength range. AR.33 for 1064 nm is available from stock on most Newport lenses. All other V-coatings can be coated on a semi-custom basis. OPTICAL MIRRORS Laser Line...

OPTICAL MIRRORS Singlet Lens SPHERICAL AND ASPHERICAL LENSES • BK 7 and UV grade fused silica • Precision polished surfaces • Precise specifications and tolerances • Broadband or laser line antireflection coatings • Standard diameters and focal lengths • Over 1,000 lenses to provide solutions for your application Designed to meet the demanding requirements of laser electro-optic applications, Newport's singlet lenses are manufactured from fine annealed BK 7 optical glass or UV grade fused silica. These lenses are polished to tight tolerances using master test plates to ensure minimum wavefront...

OPTICAL MIRRORS BK 7 Precision Plano-Convex Lenses • l/4 surface irregularity, 40-20 scratch-dig • MgF2, multilayer broadband or laser line AR coatings available • Standard diameters and focal lengths • Over 300 distinct models to choose from To order a lens with an AR coating, append the coating code -C, AR.14, AR.16, AR.18 or AR.33 to the lens product number. Antireflection coating specifications can be found on page 709. CYLINDRICAL & OPTICAL WINDOWS & ACHROMATIC LENSES DIFFRACTION GRATINGS Ordering Information Focal Length (mm) SPHERICAL AND ASPHERICAL LENSES 90.440 CLEANING & OTHER LAB ESSENTIALS...

OPTICAL MIRRORS SPHERICAL AND ASPHERICAL LENSES BEAMSPLITTERS WAVEPLATES AND POLARIZERS OPTICAL WINDOWS & CYLINDRICAL & DIFFRACTION GRATINGS ACHROMATIC LENSES LH Series Lens Mounts page 893 Infrared Lenses page 727 CLEANING & OTHER LAB ESSENTIALS OPTICAL MODULATORS MULTI-ELEMENT OPTICAL ASSEMBLY BEAM EXPANDERS IR Achromatic Lenses page 794 Near IR Achromatic Lenses page 787 Broadband Corrected Triplet Lenses page 736