Lens 1.7

The phrase 'lens 1.7' primarily refers to two distinct high-performance product categories: High-Index Eyeglass Lenses (1.70/1.71 refractive index) and Photography/Projection Lenses (f/1.7 aperture or 1.7mm focal length).

1. High-Index Eyeglass Lenses (1.70 / 1.71)

In the ophthalmic industry, 1.7 refers to the refractive index, a measure of the material's light-bending efficiency. It is a premium "ultra-high index" tier positioned between the common 1.67 and 1.74 standards.

* Key Products:

* Tokai 1.70 (Japanese): Pioneered by Tokai Optical, these lenses are marketed as the ultra-thin choice for high prescriptions, significantly reducing edge thickness and "eye-shrinking" effects TiktokTokaiopt.

* MR-10/MR-7 Materials: High-index 1.70/1.71 lenses often use proprietary polyurethane resins (like Mitsui Chemicals' MR series) to achieve superior clarity (Abbe value) and impact resistance compared to standard 1.74 lenses IotlensesIcarelabs.

* Market Trends:

* Premium Positioning: While 1.74 is the thinnest, 1.70 is often preferred by optical professionals for its better optical clarity and durability in rimless frames ZenotticZenottic.

* Market Growth: The global eyewear market is projected to reach $192.74 billion by 2026, with high-index lenses growing at a CAGR of ~6-7% due to rising myopia rates worldwide Fortunebusinessinsights.

2. Photography, CCTV, and Projection Lenses

In imaging technology, 1.7 typically specifies Aperture (f/1.7), Focal Length (1.7mm), or Throw Ratio (1.7:1).

* Product Insights:

* f/1.7 Aperture: Found in "fast" prime lenses (e.g., 25mm f/1.7), highly sought after for low-light photography and creating a shallow depth-of-field (bokeh) DegruyterbrillGearsource.

* 1.7mm Wide-Angle: Common in CCTV and Machine Vision for ultra-wide field-of-view (approx. 118° horizontal) needed in security and industrial automation FjwopticalOptics-Online.

* 1.7 Zoom/Throw: Professional projectors (like Christie LNS520) use a 1.7–2.8 throw ratio, defining the distance needed to fill a screen GearsourceGearsource.

Market Summary & Sourcing

The market for these products is shifting toward AI-integrated optical design (optimizing lens surfaces for digital eye strain) and ultra-miniaturization in smart glasses Fortunebusinessinsights.

I have compiled a list of high-index 1.71 optical lens suppliers and relevant B2B product listings, primarily from established optical hubs like Danyang and Wenzhou, China. Detailed pricing and MOQ data can be found in the attached files.