NEC NP4100 projector rojection Reflective Prism – New original, also fits Sanyo PDG-DXT10L and Vivitek Projector

Original NEC NP4100 Projector Triangular Reflective Mirror – Genuine NEC Spare Part

If your NEC NP4100 projector has started showing color distortion, image deformation, uneven brightness, or noticeable light attenuation — don’t scrap the whole unit. In many cases, the problem is a degraded reflective prism. This 100% original, genuine NEC spare part is the exact replacement you need to restore your projector’s optical performance.

This is not a refurbished or generic copy. It’s a brand new, factory‑sealed NEC triangular reflective mirror, designed specifically for the NP4100’s optical engine. Every detail – glass quality, mirror coating, prism angles – matches NEC’s original service parts.

Why reflective prisms fail – and why you need a genuine one

Over time, the optical cement layer that bonds prism elements can degrade due to heat and prolonged use. This leads to delamination, small cracks, or haze inside the glass. Dust accumulation further reduces light transmission, causing uneven brightness or color patches. Some generic prisms also use poor‑quality glass or incorrect angles, which results in image deformation or focus shift. This genuine NEC triangular mirror uses factory‑spec optical glass, proper reflective coatings, and precise geometry – it restores the original light path and image quality.

What a new genuine reflective prism fixes

• Color distortion – uneven color across the image, or strange tinting.
• Image deformation – warped or skewed shapes, especially near the edges.
• Light attenuation – dimmer image even with a new lamp.
• Hot spots or uneven brightness – some areas brighter than others.

Replace the degraded prism with this genuine NEC part, and your projector will deliver clean, uniform, and bright images again.

Restore your NEC NP4100 – not the whole projector

Swapping the triangular reflective mirror is a careful but straightforward repair for anyone experienced with optical components. The new prism drops into the original mounting position and aligns exactly with the light engine. You get back proper light transmission, accurate colors, and sharp geometry. Don’t scrap a perfectly good DLP chip and lamp – just change the one optical part that wears out. Keep your large‑venue or installation projector running like new.

Note: Compare this prism’s size and shape with your old one. Send us a photo if you’re unsure about compatibility.