Disney's Adventures of the Gummi Bears (1985)

S1E21 Light Makes Right

The Gummies stumble upon a massive device called the Gummiscope, which captures sunlight for long-distance communication. This invention offers them a chance to reach out to the Great Gummis across the sea. However, it also has a darker purpose; Duke Igthorn seizes the opportunity to turn it into a laser weapon, threatening King Gregor and coercing him into submission.