The meaning of FRESNEL LENS is a lens that has a surface consisting of a concentric series of simple lens sections so that a thin lens with a short focal ...

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The ballistic parachute allows pilots to land safely in the rare event of an in-flight emergency. Another of Helix's many safety features.

The condenser has an iris diaphragm that controls the angle of the beam of light focused onto the specimen. The iris diaphram is an adjustable shutter which ...

The canopy is seamlessly integrated into the airframe, offering pilots an unparalleled field of view while optimizing aerodynamics. Pilots can choose between clear or tinted canopies, tailoring their selection to suit the demands of their flight environment, whether low-light or bright daylight conditions.

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Motorized Linear Stage Selection Guide · Repeatability and Travel Distance · Load Capacity and Travel Distance · (1) Precise, Compact and Rigid · (2) Easy ...

Unique among light eVTOLs, Helix's efficient blown-lift design increases lift during forward flight and supports smooth takeoffs and landings.The wings are easy to detach for transportation and storage.

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mCherry is a fluorophore (a fluorescent molecule) used in biotechnology as a tracer to follow the flow of fluids, as a marker when tagged to molecules and cells ...

Jie Yuan, Xingyu Li, Lulu Guan, Zhuang Liu, Shuo Dong, Yuxin Yang, Kaidong Xu, and Shiwei Zhuang Opt. Mater. Express 13(5) 1249-1258 (2023)

Shop for Conair Styling Essentials 15x Magnification Lighted Mirror (1 ct) at Fred Meyer. Find quality beauty products to add to your Shopping List or order ...

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It's a lot like the lens in a telescope or camera, which also focuses light and helps form images. You can also use the word lens as a metaphor for how you see ...

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Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

1State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument, Tsinghua University, Beijing 100084, China

Polarcor™ UltraThin™ is a 30-micron glass polarizer that provides greater versatility for managing polarization in components throughout a ...

Placed at the end of the winglets and under the fuselage, five floats enable Helix to make safe emergency landings on water. The floats further increase the use of Helix for flight over water while increasing overall safety.

Take to the skies confidently, knowing that everything we do begins and ends with safety. From continuous design evolution to extensive testing, training, monitoring, and support, Pivotal sets and raises the safety bar for light eVTOL aircraft.

Dmitriy L. Voronov, Sooyeon Park, Eric M. Gullikson, Farhad Salmassi, and Howard A. Padmore Opt. Express 31(16) 26724-26734 (2023)

Chen Shen, Xin Tan, Qingbin Jiao, Wei Zhang, Na Wu, Heshig Bayan, and Xiangdong Qi Opt. Express 26(19) 25381-25398 (2018)

Non-linear distortion describes the ways in which an outgoing audio signal differs from the ingoing signal. The frequencies present in the outgoing sound that ...

A twice oblique ion beam etching method is proposed to fabricate triangular blazed gratings that have controllable both blaze angle and anti-blaze angle. The anti-blaze angle is controlled by first obliquely etching the photoresist mask to obtain an asymmetrical trapezoidal grating, one sidewall of which then evolves into the anti-blaze facet in the second etch step. The blaze angle is controlled by obliquely etching the asymmetrical trapezoidal grating to obtain a triangular blazed grating. We show the key process steps of the method by fabricating a blazed grating with the blaze angle of 20.9° and the anti-blaze angle of 89.0°. The method is verified not only to increase the anti-blaze angle to near 90°, but also have a good tolerance against over-etching.

The Helix airframe tilts upwards for vertical takeoff and landing, and pivots to horizontal for forward flight. Other eVTOLs pivot their rotors or wings, not their airframes. With fewer moving parts, our tilt aircraft reduces weight and complexity, leading to increased range, safety, and reliability.

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Marcell Kiss, Teodoro Graziosi, Adrien Toros, Toralf Scharf, Christian Santschi, Olivier J. F. Martin, and Niels Quack Opt. Express 27(21) 30371-30379 (2019)

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A twice oblique ion beam etching method is proposed to fabricate triangular blazed gratings that have controllable both blaze angle and anti-blaze angle. The anti-blaze angle is controlled by first obliquely etching the photoresist mask to obtain an asymmetrical trapezoidal grating, one sidewall of which then evolves into the anti-blaze facet in the second etch step. The blaze angle is controlled by obliquely etching the asymmetrical trapezoidal grating to obtain a triangular blazed grating. We show the key process steps of the method by fabricating a blazed grating with the blaze angle of 20.9° and the anti-blaze angle of 89.0°. The method is verified not only to increase the anti-blaze angle to near 90°, but also have a good tolerance against over-etching.

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Dual joyticks, one on each side of the flightdeck, allow pilots to use their preferred hand to control Helix simply and intuitively. The second joystick is a safety backup.

When two things appear as opposites, they are contrasting. You might like the contrasting dark and light areas of a painting, with the clash of shades ...

By reducing pilot workload, the Helix autoland feature enhances safety during one of the two most critical phases of flight. Four radar altimeter sensors precisely track the aircraft's altitude above ground level (AGL) to ensure that pilots are confident that landing will be both accurate and easy.

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Lasers allow us to use the energy from electron emissions to produce beams of light. The word laser is an acronym for light amplification by stimulated ...

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Helix's simple unibody design significantly increases the places that pilots can take off and land, whether it's grass, dirt, gravel, asphalt, or concrete. A replaceable keel strip protects the belly of the aircraft.

The powerful capabilities of Helix are guided by intuitive controls, designed to get you off the ground effortlessly.

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The Helix fly-by-wire system takes the complexity out of flying by transmitting signals from the joystick to eight propulsion units and elevons via our electronic guidance, navigation, and control system. Each propulsion unit consists of two high performance batteries, an electric motor, and a state-of-the-art carbon propeller. By reducing the number of moving parts, we have turned our unique design into a key contributor to Helix's high thrust-to-weight ratio and safety.