Keplerian beam expander. If each element is shaped .
Keplerian beam expander. A beam expander expands or reduces the diameter of a beam of collimated light. The two basic configurations used for these afocal systems are the Galilean and the Keplerian telescope types, shown in Figs. If each element is shaped The two basic configurations used for these afocal systems are the Galilean and the Keplerian telescope types, shown in Figs. With a fixed design, increasing the input aperture . 1 and 2. Contemporary laser beam expanders are a focal system developed from well-established optical telescope fundamentals. Table 1 shows which lenses to select in order to create a 532nm Keplerian beam expander of a given magnification. The combination produces a light beam or laser beam that is both larger in size and highly collimated. Figure 1 Galilean beam expander. Figure 2 Keplerian beam expander. In the Keplerian model the focal lengths of both lenses will be positive, their addition resulting in a focal point in the gap between the lenses at the point where the two focal lengths meet. Increasing the input aperture size increases the cost of the beam expander rapidly at larger input apertures because of the nonlinear dependence of aberrations on input beam diameter (b). 4 Considerations for Beam What is a Beam Expander? Laser beam expanders increase the diameter of a collimated input beam to a larger collimated output beam for applications such as laser scanning, interferometry, and remote sensing. Both Keplerian beam expanders and Galilean beam expanders can serve as beam expanders. It comes in different configurations such as the Keplerian and Galilean beam expander design. Let’s discuss the different designs and characteristics of beam expanders and reducers, including the Keplerian and Galilean designs Our laser beam expander calculator will teach you everything you need to know about these simple devices. The magnification provided in both cases equals the focal length of the output lens divided by the focal length of the input lens. In the Keplerian beam ex-pander design, the collimated input beam focuses to a spot be-tween the objective and image lenses, producing a point within the system where the laser’s energy is concentrated (Figure 3). Technologically, the keplerian beam expander features a two-lens system, where the first lens converges the incoming light, and Sep 14, 2023 · Laser beam expanders manipulate and enhance laser beams. Let’s discuss the different designs and characteristics of beam expanders and reducers, including the Keplerian and Galilean designs Learn how laser beam expanders, like Galilean and Keplerian, improve beam quality for diverse scientific and industrial uses. These devices are used to increase or decrease the diameter of a laser beam, which is critical for many applications. Although the beams are collimated, their diameters change as they propagate due to the effects of diffraction. The keplerian beam expander is a sophisticated optical device designed to increase the diameter of a laser beam while maintaining its divergence angle. See full list on edmundoptics. Laser beam expanders find utility in tasks like laser marking, cutting, and engraving Aug 23, 2024 · Beam expanders and reducers are essential optical components in many applications, including laser technology, microscopy, and imaging systems. Typically composed of lenses, mirrors, or a combination, these devices come in various designs, such as Keplerian or Galilean, each with its specific applications. Zoom beam expanders to continuously expand or reduce the diameter Jun 12, 2017 · FIGURE 1. Sep 23, 2024 · Keplerian Beam Expander: This type uses two positive lenses and provides a simple and compact design. Thorlabs' Galilean type beam expanders, which are available in both fixed- and variable-magnification options, are offered for use in the UV, visible, near infrared, and mid-infrared spectral ranges. Jul 2, 2021 · Beam expanders and reducers are typically used only with collimated beams, rather than diverging beams, and these designs take their inspiration from Keplerian and Galilean telescopes. Beam Expander from Shanghai Optics Beam Expanders are optical devices that increase the diameter of the input beam to produce a larger output. 1 Keplerian Telescope 1. The marginal ray converges under an angle γ. Figure 1: Beam radius versus position in a 2 × Keplerian beam expander. For more energetic lasers, the Professional laser beam expander calculator: Galilean and Keplerian designs, magnification analysis, optical performance optimization. As laser energy increases, the necessity of higher quality and precision optics and coatings causes the cost of the beam expander to increase (a). Used with collimated positive focal lengths. Since each of the two elements is suffering from spherical aberration, the exiting beam is not precisely collimated. Keplerian and Galilean beam expanders A Keplerian telescope consists of two plano-convex convergent lenses placed so that the distance between the lenses is equal to the sum of their focal length. 2 Variable Beam Expanders 1. Aug 23, 2024 · Beam expanders and reducers are essential optical components in many applications, including laser technology, microscopy, and imaging systems. Complete beam expansion system design tool. [1] A refracting telescope commonly used is the Galilean telescope which can function as a simple beam expander for collimated light. com Keplerian Beam Expander The easiest beam expander to build is a Keplerian Telescope. 2 Galilean Telescope 1. Refers to lenses that converge light rays to a focal point. The fixed-magnification, sliding-lens beam expanders are offered with optics that have either narrowband or wideband AR coatings. However, it is not well-suited for applications requiring high expansion ratios due to its limited field of view. The same lens sizes and focal lengths can be used with different coatings to tailor the beam expander for different wavelengths, and the same focal length ratios will work for constructing a Galilean beam expander. 1 Common Configurations of Beam Expanders 1. 1 One-Directional Beam Expanders 1. 2 Reflective Beam Expanders 1. Keplerian Beam Expander The easiest beam expander to build is a Keplerian Telescope. Telescopic beam expanders include refracting and reflective telescopes. This is a simulation of two types of beam expanders - Keplerian beam expander, and Galilean beam expander. Specifications Both Keplerian beam expanders and Galilean beam expanders provide a magnification type known as expander power. Jul 2, 2021 · Beam expanders and reducers are typically used only with collimated beams, rather than diverging beams, and these designs take their inspiration from Keplerian and Galilean telescopes. 3 Specialized Beam Expanders 1. Jul 11, 2017 · In the Keplerian beam expander design, the collimated input beam focuses to a spot between the objective and image lenses, producing a point within the system where the laser’s energy is concentrated (Figure 1). The focused spot heats the air between the lenses A Keplerian beam expander has two converging lenses, separated by the sum of their focal lengths. For strong laser energy, the convergence point generates heat, which affects the wavefront and increases aberration. 1 What is a Beam Expander? 1. 3. The formula for calculating the beam expansion ratio (m) is the same for both Keplerian and Galilean designs. Because there is a high power density due to the focused spot size at the focal point between the lenses, Keplerian Optics Manufacturer & Supplier | Imaging Lens & Laser Optics THEORY: LASER BEAM EXPANDERS In a laser beam expander design, the placement of the objec-tive and image lenses is reversed. Generally prismatic beam expanders use several prisms and are known as multiple-prism beam expanders. After this power increases the beam diameter in size, the beam divergence is then reduced by this same power. For achieving a given magnifying power (expansion ratio, ratio of beam radii), one may use different values of focal length. Lens selection, design, and Zemax examples included. Learn to build beam expanders (Keplerian & Galilean) with this optics technical note. A collimated input beam converges to a focal point between the two lenses, then diverges to the output lens. Aug 23, 2024 · Expansion Ratio Beam expanders and reducers are designed to accept and provide collimated beams. In beam expanders, lenses with positive focal lengths are used to manipulate the beam path effectively, either in Keplerian or Galilean telescope Beam expanders are optical devices designed to enlarge the diameter of a laser beam while maintaining its parallel nature, known as collimation. Its main functions include beam enlargement and the precise control of laser performance in various applications. Sep 14, 2023 · Laser beam expanders manipulate and enhance laser beams. If each element is shaped Contents [hide] 1 Understanding Beam Expanders in Optics 1. 1. The Keplerian beam expander easily achieves a larger amplification effect, but its disadvantage is the laser convergence point in the middle of the lens. lhyykie0wtxzlnylr9w7inb6idod6ag3e7vbu