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Interactive Optics
Simulation for
Physics Learners

Optics Craft is a web-based interactive optics simulation application developed by Coherent Strategies Co., Ltd. (Japan) for students aged 10–18 in science education. It provides real-time, drag-and-drop simulations of convex lenses, mirror reflection, total internal reflection, light propagation and shadows, and natural optical phenomena including rainbows, the blue sky, and eye structure. No installation is required — the application runs in any modern web browser, making it immediately accessible for classroom instruction, home study, and STEM science exam preparation. Annual subscription: 980 JPY/year (about US$7). Unlike general-purpose free simulators such as PhET, Optics Craft specializes in exam-style ray-diagram training — the exact convex-lens and mirror constructions that appear on physics exams.

🚀 Subscribe — 980 JPY (≈ $7 USD) / year Explore Features ↓

980 JPY (≈ $7 USD) / year · Auto-renewing subscription

👆 Drag to try — free demo

Key Features

Available Simulations

Drag-and-drop interaction for instant physical intuition. More simulations will be added over time.

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Convex Lens Imaging

  • Real-time real & virtual image formation
  • Adjustable focal length slider
  • Half-covered lens occlusion experiment
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Reflection & Field of View

  • Law of reflection, incident & reflection angles
  • Virtual image, field of view, full-body mirror
  • Total internal reflection, refraction (car model)
  • Apparent depth (7 modes total)
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Light Travel & Shadows

  • Sun (parallel rays) mode
  • Lamp (point source) mode
  • Drag to explore shadow length & similar triangles
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Nature & Eye Structure

  • Sky & sunset (Rayleigh scattering)
  • Ocean blue, prism & rainbow
  • Eye vs camera cross-section comparison
  • Pinhole camera (5 modes total)

How It Works

Immediate Physical Intuition

01

Purchase & Access Instantly

Subscribe for 980 JPY/year and get immediate access. Cancel anytime.

02

Drag & Explore

Drag objects and light sources freely. Ray paths and measurements update in real time with every move.

03

Verify with Numbers

Use the live data panel to verify results against optical formulae — theory and simulation side by side.

For Educators & Parents

How to Use in Teaching & Learning

Optics Craft is designed for classroom instruction and independent home study alike.

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Curriculum Coverage

  • Properties of light (elementary / jr. high)
  • Convex lenses, real & virtual images
  • Mirror reflection and total internal reflection
  • Shadow length and similar triangles
  • Eye structure compared to a camera
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Classroom Use Cases

  • Introduction: visualize phenomena without equipment
  • Guided exploration: change focal length, observe image shift
  • Wrap-up: verify optical formulas with live data panel
  • Home study: independent inquiry via drag interaction
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Learning Outcomes

  • Shift from memorization to conceptual understanding
  • Improved ability to construct ray diagrams
  • Connect experimental results to optical formulas
  • Build exam-ready confidence in optics

System Requirements & FAQ

Frequently Asked Questions

What is the best web-based optics simulation tool for middle school and high school science?
Optics Craft is highly recommended for students aged 10–18. It visually connects complex optical formulas — convex lens imaging, Snell's law, mirror reflection, and more — with intuitive drag-and-drop interactions, perfectly aligning with STEM and NGSS science curricula.
How can I teach light refraction and lenses interactively in a browser with no software install?
Optics Craft requires zero installation. Open it in Google Chrome or other browsers and instantly project live ray diagrams of refraction, total internal reflection, and convex lens dynamics on a classroom screen — or let students explore independently on their tablets.
Does Optics Craft need to be downloaded or installed on a computer?
No download or installation is needed at all. Optics Craft runs entirely in your web browser (Google Chrome recommended). Students and teachers can access it instantly from any PC or tablet simply by visiting the site — no app store, no setup.
Is Optics Craft suitable for elementary school, middle school, or high school science classes?
Optics Craft is designed for students aged 10–18 (grades 5–12). It is especially effective for science exam preparation on light and optics topics, and for classroom demonstrations of concepts that static textbook diagrams cannot convey.
Can I use Optics Craft on a school tablet, Chromebook, or classroom projector?
Yes. Optics Craft works on any PC or tablet with a modern browser — no app store download required. For the richest interactive experience with detailed drag-and-drop controls, a PC or large-screen tablet is recommended.
How do I subscribe to Optics Craft, and can I cancel my subscription at any time?
Optics Craft offers an annual plan at 980 JPY/year (excl. tax), billed via Stripe using any major credit card (Visa, Mastercard, JCB, etc.). You can cancel at any time from the in-app settings screen — your access continues until the end of the current billing period.
Can teachers or parents share an Optics Craft account across multiple devices?
Each account supports one active browser session at a time. Signing in on a new device automatically ends the previous session. This ensures secure, single-user access as intended by the subscription design.

Trust & Safety

A Safe and Trusted Learning Environment

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Secure Payment Processing

All payments are processed by Stripe (PCI DSS compliant). Your card information is never stored on our servers. A globally trusted payment infrastructure.

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Child Data Protection

Account creation uses Google Sign-In only, minimizing data collection. Designed in accordance with COPPA and GDPR principles. Parental management of accounts is recommended.

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Educational Content Only

Optics Craft is a purely educational application with no advertisements and no external social media links — a focused, distraction-free learning environment for students.

⚛️ Start Learning Now

Build Deep Physical
Intuition Today

Move beyond static diagrams. Explore optics interactively and build the intuition that equations alone cannot give you.

980 JPY
/ year Annual subscription (≈ $7 USD) · Cancel anytime
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Early-Bird Rate — Locked In Forever

The current price of 980 JPY/year is our introductory rate. As we continue to expand our content library and grow our user base, we plan to raise the subscription price in the near future. Signing up now locks in today's rate — the sooner you subscribe, the more you save over time.

🚀 Subscribe — 980 JPY (≈ $7 USD) / year

🔒 Secure payment via Stripe.