Laser Focus World is an industry bedrock—first published in 1965 and still going strong. We publish original articles about cutting-edge advances in lasers, optics, photonics, sensors, and quantum technologies, as well as test and measurement, and the shift currently underway to usher in the photonic integrated circuits, optical interconnects, and copackaged electronics and photonics to deliver the speed and efficiency essential for data centers of the future.

Our 80,000 qualified print subscribers—and 130,000 12-month engaged online audience—trust us to dive in and provide original journalism you won’t find elsewhere covering key emerging areas such as laser-driven inertial confinement fusion, lasers in space, integrated photonics, chipscale lasers, LiDAR, metasurfaces, high-energy laser weaponry, photonic crystals, and quantum computing/sensors/communications. We cover the innovations driving these markets.

Laser Focus World is part of Endeavor Business Media, a division of EndeavorB2B.

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Following the Photons: A Photonics Podcast dives deep into the fascinating world of photonics. Our weekly episodes feature interviews and discussions with industry and research experts, providing valuable perspectives on the issues, technologies, and trends shaping the photonics community.

Editorial Advisory Board

  • Professor Andrea M. Armani, University of Southern California
  • Ruti Ben-Shlomi, Ph.D., LightSolver
  • James Butler, Ph.D., Hamamatsu
  • Natalie Fardian-Melamed, Ph.D., Columbia University
  • Justin Sigley, Ph.D., AmeriCOM
  • Professor Birgit Stiller, Max Planck Institute for the Science of Light, and Leibniz University of Hannover
  • Professor Stephen Sweeney, University of Glasgow
  • Mohan Wang, Ph.D., University of Oxford
  • Professor Xuchen Wang, Harbin Engineering University
  • Professor Stefan Witte, Delft University of Technology

Research Frontiers Incorporated - Common Stock (NQ:REFR)

1.440 -0.010 (-0.69%)
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Historical Prices

Date Open High Low Close Volume Change (%)
Oct 03, 2025 1.440 1.550 1.430 1.440 47,068 -0.01(-0.69%)
Oct 02, 2025 1.600 1.600 1.440 1.450 63,511 -0.12(-7.64%)
Oct 01, 2025 1.610 1.610 1.520 1.570 16,747 -0.02(-1.26%)
Sep 30, 2025 1.530 1.650 1.520 1.590 86,448 +0.08(+5.30%)
Sep 29, 2025 1.570 1.608 1.500 1.510 35,157 -0.03(-1.95%)
Sep 26, 2025 1.600 1.658 1.475 1.540 24,762 -0.02(-1.28%)
Sep 25, 2025 1.680 1.680 1.500 1.560 75,126 -0.13(-7.69%)
Sep 24, 2025 1.450 1.730 1.424 1.690 156,805 +0.27(+19.01%)
Sep 23, 2025 1.445 1.445 1.381 1.420 27,688 +0.01(+0.71%)
Sep 22, 2025 1.440 1.450 1.370 1.410 29,117 -0.02(-1.40%)
Sep 19, 2025 1.400 1.430 1.345 1.430 58,185 +0.03(+2.14%)
Sep 18, 2025 1.381 1.447 1.370 1.400 18,887 +0.02(+1.45%)
Sep 17, 2025 1.350 1.420 1.350 1.380 11,239 +0.03(+2.22%)
Sep 16, 2025 1.210 1.352 1.210 1.350 25,290 +0.09(+7.14%)
Sep 15, 2025 1.260 1.270 1.210 1.260 43,083 +0.01(+0.80%)
Sep 12, 2025 1.280 1.290 1.220 1.250 49,819 -0.02(-1.57%)
Sep 11, 2025 1.290 1.330 1.270 1.270 10,233 -0.02(-1.55%)
Sep 10, 2025 1.280 1.315 1.280 1.290 10,664 +0.04(+2.79%)
Sep 09, 2025 1.310 1.310 1.240 1.255 41,314 -0.05(-3.46%)
Sep 08, 2025 1.302 1.325 1.290 1.300 4,884 +0.01(+0.78%)
Sep 05, 2025 1.300 1.320 1.250 1.290 34,023 -0.01(-0.77%)
Sep 04, 2025 1.330 1.360 1.300 1.300 25,436 -0.02(-1.52%)
Sep 03, 2025 1.320 1.336 1.300 1.320 5,380 -0.01(-1.12%)
Sep 02, 2025 1.360 1.361 1.310 1.335 15,900 -0.02(-1.11%)
Aug 29, 2025 1.390 1.450 1.350 1.350 52,246 -0.12(-8.16%)
Aug 28, 2025 1.420 1.470 1.420 1.470 12,962 +0.07(+5.00%)
Aug 27, 2025 1.410 1.420 1.398 1.400 10,741 +0.00(+0.14%)
Aug 26, 2025 1.415 1.440 1.380 1.398 15,485 +0.02(+1.30%)
Aug 25, 2025 1.370 1.412 1.370 1.380 27,303 -0.02(-1.43%)
Aug 22, 2025 1.427 1.452 1.380 1.400 15,279 +0.03(+2.19%)
Aug 21, 2025 1.390 1.440 1.370 1.370 22,394 -0.02(-1.44%)
Aug 20, 2025 1.427 1.440 1.370 1.390 21,979 -0.04(-2.80%)
Aug 19, 2025 1.470 1.488 1.380 1.430 84,010 -0.04(-2.72%)
Aug 18, 2025 1.470 1.490 1.470 1.470 35,467 +0.00(+0.00%)
Aug 15, 2025 1.560 1.564 1.470 1.470 28,371 -0.05(-3.29%)
Aug 14, 2025 1.530 1.530 1.497 1.520 9,123 +0.01(+0.66%)
Aug 13, 2025 1.500 1.565 1.500 1.510 17,800 +0.01(+0.67%)
Aug 12, 2025 1.500 1.570 1.500 1.500 20,000 +0.00(+0.00%)
Aug 11, 2025 1.510 1.540 1.500 1.500 18,837 -0.03(-1.96%)
Aug 08, 2025 1.500 1.620 1.490 1.530 49,900 -0.04(-2.55%)
Aug 07, 2025 1.544 1.610 1.520 1.570 51,657 +0.04(+2.61%)
Aug 06, 2025 1.520 1.631 1.520 1.530 28,828 -0.04(-2.55%)
Aug 05, 2025 1.530 1.650 1.530 1.570 10,420 -0.01(-0.63%)
Aug 04, 2025 1.580 1.700 1.520 1.580 63,931 -0.02(-1.25%)
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